Best Betting Sites in 2019

Welcome to the Bet1015.com site which lists the very best UK online betting sites and offers for punters.

Rank
Site
Bonus
Rating
Visit
1
300% up to£30
New UK & NI customers only. 18+. Sign up using promo code ‘SPORTS60’. Deposit & place first sports bet at a minimum of £10 in one bet transaction at evens (2.0) +. £30 paid in free bets within 48 hours of bet settlement, expires 7-days after issue. Offer not available to those registering on 06/04/2019. E-Wallet & Prepaid Card restrictions apply. Your first bet must be settled within 60 days of bet placement. SMS validation may be required. Game restrictions apply. Maximum 30 Free Spins on selected games. Free Spins expire after 7 days. Full T&Cs apply.
2
100% up to£20
New customers only. Turnover Requirements are x 7 of your deposit and bonus amount. The bonus expires after 30 days. 18+ BeGambleAware. Full terms apply.
3
300% up to£30
New online customers only, min £10/€10 stake, win only, min odds 1/2, free bets paid as 3 X £10/€10, 30 day expiry, free bet/payment method/player/country restrictions apply. See full terms below.
4
100% up to£10
18+. New and selected customers only. Opt-in and £/€10 min deposit required. 1 x wagering required before withdrawal. Additional terms apply.
5
100% up to£10
New customer only, Max one £10 free bet, Qualifying bets must be placed at odds of 2.0 (1.1) or Greater, Paid as bonus token with min odds reg, T&C Apply. 18+ only.
6
100% up to£100
Up to £100 in Bet Credits for new customers at bet365. Min deposit £5. Bet Credits available for use upon settlement of bets to value of qualifying deposit. Min odds, bet and payment method exclusions apply. Returns exclude Bet Credits stake. Time limits and T&C's apply.
7
100% up to£25
18+only. General Promotions Terms Apply. Offer for UK new customers only and have to be KYC verified. Maximum £25 free bet and Minimum of 3 selections in a accumulator is needed. there are minimum odds per selection of 7/10 (1.70). Your Free bet stake is not returned. Certain Markets/sports/payment methods restrictions apply. The Qualifying bet must be made within 30 days. Free bet valid for 30 days. Full T&C's apply.
8
400% up to€30 Sports + €10 Casino
18+. Min stake £10. Min odds Evs. First bet only. 30 days to qualify. Free bets expire in 7 days. 20x wagering requirement & max win cap £250. 14 days to accept Casino bonus. Once accepted it is active for 3 days. Cashed out bets won’t apply. Payment method restrictions. IRE/NI customers only. T&Cs apply ⇓ **18+. Opt in. UK/IRE customers only. Max Stake £/€20. Max free bet £/€500. 1st pre live single on selected markets. 90 mins only. Free/cashed out/combined Odds bets won’t qualify. Free bet expires after 7 days. T&Cs apply.
9
100% up to€/£50
New Customers; Min. deposit £15 (no Skrill/Neteller); Bonus amount is 50% of deposit up to €/£50; 8 x deposit and bonus turnover (min. odds 4/5 on singles and 2/5 per selection on acca bets), in 30 days, for bonus release; Some bet types don’t contribute to turnover; Withdrawal before turnover results in bonus cancellation; Terms apply, 18+
10
50% up to£50
New customers only. Min Deposit £10. Deposit & bonus amount must be wagered 6 times (min odds 4/5) prior to withdrawing bonus funds and any winnings. Wins from real money bets withdrawable at any time. Bonus on sports betting only. T&Cs apply.

Football, Tennis, Horse Racing, Cricket, Golf, Tennis, Boxing, Champions League, ATP, Grand National, whatever your sport or sporting event we have you covered with the best free bets and promotions for you to cash in today.

New UK Betting Sites

Tired of your existing online bookmaker or just want to see which sports sites are new on the scene?. Then check out our Top 10 new UK best sites list below.

Rank
Site
Bonus
Minimum Deposit
Visit
1
100% up to£25
£10
18+only. General Promotions Terms Apply. Offer for UK new customers only and have to be KYC verified. Maximum £25 free bet and Minimum of 3 selections in a accumulator is needed. there are minimum odds per selection of 7/10 (1.70). Your Free bet stake is not returned. Certain Markets/sports/payment methods restrictions apply. The Qualifying bet must be made within 30 days. Free bet valid for 30 days. Full T&C's apply.
2
100% up to£20
£10
New customers only. Turnover Requirements are x 7 of your deposit and bonus amount. The bonus expires after 30 days. 18+ BeGambleAware. Full terms apply.
3
5% up to£20
£10
Only available to new customers. Min. deposit £20 (no Skrill/Neteller). Cashback capped at £20. Max bet £100. Only valid on sports betting with min odds 3/4 (1.75). Must wager £400 for full cashback. Offer expires after 30 days. 18+. T&C apply.
4
100% up to£10
£10
New Players Only. Minimum stake £10, minimum odds 1/2, stake not returned. 1 X wagering the winnings from the free bet. Wagering occurs from real balance first. Wagering requirement is calculated on bonus bets only, wagering starts from real funds. Free bet is valid for 7 Days from issue. Full T&C's apply
5
100% up to£10
£10
New customers only. Max one £10 free bet, Qualifying bets must be placed at odds of 1/1 or greater, paid as bonus token with min odds required. T&C's apply. 18+.
6
100% up to£10
£10
New customer only, Max one £10 free bet, Qualifying bets must be placed at odds of 2.0 (1.1) or Greater, Paid as bonus token with min odds reg, T&C Apply. 18+ only.
7
100% up to£28
£10
T & C Apply, 18+, Begambleaware.org
8
100% up to£10 Free Bet Plus 10 Free Spins
£10
T & C Apply, 18+, gambleaware.co.uk
9
100% up to£25
£5
18+, T & C's Apply, gambleaware.co.uk.

As new betting sites are being launched all the time punters face a decision as to which are the best ones to join?. The bookmakers that have been granted a UK license are your first port of call. This means that you are looking at only the best sites that are licensed and regulated by the UK Gambling Commission. We do further checks on the bookmaker sites and make sure they deliver on sports betting choice, sign up bonus, security, safety and customer service.

Best Rugby Betting Sites

Rugby Betting sites for the World Cup 2019If you've never bet on Rugby before or if you are looking forward to grabbing the latest sign up offers from the best Rugby bookies then check out our Rugby betting page. We not only list the best Rugby bookmakers to join we also explain how to bet on Rugby with tips, odds and the latest World Cup 2019 offers. Get ready for the biggest showdown in Rugby Union as the tournamnet kicks off 20th September to the 2nd of November.

Best Cricket Betting Sites

Best Cricket betting sites UK

We have our latest betting preview ready for the 4th Ashes Test with odds from our cricket expert. Play starts on the 4th and runs until the 8th September. The 4th Test takes place at Old Trafford between England v Australia. The 2nd Ashes Cricket Test proved successful for our betting advice and we had 3 more tips for the 3rd Series.

You can get exciting  promotions from the bookmakers during this time. First though read our expert cricket betting Guide on all you need to know and how best to place your cricket bets during the Ashes Tournament. Grab yourself some free bets along the way by visiting our cricket best betting sites page below for the best bookmakers to place your cricket wagers.

Best Tennis Betting Sites

Tennis Betting sites

Learn the basics of tennis betting and which tournaments rank among the biggest to bet on. In our tennis betting guide you will find all you need to know about betting on tennis online. A simple tennis bet strategy will serve you well. Our expert writer offers tennis tips on how best to approach placing your bets. Place your tennis bets in 2019 at our recommended top bookmakers that offer the best tennis betting markets and offers.

Best Golf Betting Sites

Best Golf Betting Sites

There are two major Golf tournaments coming up in September. So make sure you place your bets at our list of recommended golf bookmakers first for the best sign up offers. The Solheim Cup from Gleneagles takes place from the 13th to the 15th of September. Then the PGA Championship from Wentworth takes place during the 19th to 22nd.Check out the fantastic golf promotions from the bookies during this time.

10 Places Each Way at 1/5 Odds is just one of many great Golf betting offers as you can see below. Visit our Golf betting sites page for the best bookmakers to tee off from and place your bets.

Betfred Golf

  • Golf Betting on 1st Round Leader, 72-hole matches, Top Nationalities.
  • Antepost and Specials markets.
  • Daily Price Boosts.
Bet £10, Get £30 in Free Bets & 30 Free Spins offer.
New UK & NI customers only. 18+. Sign up using promo code ‘SPORTS60’. Deposit & place first sports bet at a minimum of £10 in one bet transaction at evens (2.0) +. £30 paid in free bets within 48 hours of bet settlement, expires 7-days after issue. Offer not available to those registering on 06/04/2019. E-Wallet & Prepaid Card restrictions apply. Your first bet must be settled within 60 days of bet placement. SMS validation may be required. Game restrictions apply. Maximum 30 Free Spins on selected games. Free Spins expire after 7 days. Full T&Cs apply.

Bet Over/Under

  • New Golf Open Rolfe Index betting Market
  • Bet Over/Under on a Golfer's Final Tournament finishing place.
  • Dynamic Golf Odds.
  • £10 Free Bet.
  • New Betting site.
Deposit £10 Bet With £20
18+. New and selected customers only. Opt-in and £/€10 min deposit required. 1 x wagering required before withdrawal. Additional terms apply.

10 Places E/Way 1/5

  • Get TEN Places on The British Open.
  • Acca Insurance on 5 + Fold bets.
  • Top 40 Finish Market
Bet £10 to get £40 in Free Bets
18+. Min stake £10. Min odds Evs. First bet only. 30 days to qualify. Free bets expire in 7 days. 20x wagering requirement & max win cap £250. 14 days to accept Casino bonus. Once accepted it is active for 3 days. Cashed out bets won’t apply. Payment method restrictions. IRE/NI customers only. T&Cs apply ⇓ **18+. Opt in. UK/IRE customers only. Max Stake £/€20. Max free bet £/€500. 1st pre live single on selected markets. 90 mins only. Free/cashed out/combined Odds bets won’t qualify. Free bet expires after 7 days. T&Cs apply.

Best Horse Racing Betting Sites for St Leger bets

Horse Racing Betting SitesGet ready for horse racing action as the St Leger from Doncaster approaches on the 14th of September by placing your bets early at the  best horse racing betting sites.

I only list really useful horse racing promotions like money back as free bets when your horse bet gets done on the line. Or if your horse bet has an off day and refuses to start you can get another free bet to have another go.

All the promotions listed on our horse racing betting page are designed to give you another chance or at least provide compensation for missing out on a winner. When you collect on the horses make sure you have taken advantage of the bookies promotions that will pay you out bonuses on top of your winnings. You will find all the best horse racing betting sites listed on our page below.

Btn By Neck Free Bet

T&C's apply to all promotions.

  • Refund if your Horse comes 2nd by a neck or less.
  • Extra Place Races.
  • Best Odds Guaranteed.
  • All Correct Bonuses on certain Lucky/Combo bets.
  • One Winner Bonuses on Lucky Bets.
Bet £10, Get £30 in Free Bets & 30 Free Spins offer.
New UK & NI customers only. 18+. Sign up using promo code ‘SPORTS60’. Deposit & place first sports bet at a minimum of £10 in one bet transaction at evens (2.0) +. £30 paid in free bets within 48 hours of bet settlement, expires 7-days after issue. Offer not available to those registering on 06/04/2019. E-Wallet & Prepaid Card restrictions apply. Your first bet must be settled within 60 days of bet placement. SMS validation may be required. Game restrictions apply. Maximum 30 Free Spins on selected games. Free Spins expire after 7 days. Full T&Cs apply.

Non Starter Free Bet

T&C's apply to all promotions.

  • A Free Bet if your horse fails to start.
  • Single bets only.
  • Outright Betting only.
  • Maximum Free Bet refund is up to £/€100.
Bet £10 to get £40 in Free Bets
18+. Min stake £10. Min odds Evs. First bet only. 30 days to qualify. Free bets expire in 7 days. 20x wagering requirement & max win cap £250. 14 days to accept Casino bonus. Once accepted it is active for 3 days. Cashed out bets won’t apply. Payment method restrictions. IRE/NI customers only. T&Cs apply ⇓ **18+. Opt in. UK/IRE customers only. Max Stake £/€20. Max free bet £/€500. 1st pre live single on selected markets. 90 mins only. Free/cashed out/combined Odds bets won’t qualify. Free bet expires after 7 days. T&Cs apply.

Best Football Betting Sites for Euro 2020 Qualifying

Football Betting SitesEuro 2020 Qualifying takes place from the 5th to the 10th of September and with our recommended bookies you can sign up for all the latest welcome offers.

The Premier League football season has kicked off and you can still take advantage by placing your bets on the League outright winner with Bet365's Early Payout promotion. You'll be glad you did when your team goes 10 points clear or more!.

On our best football betting sites page we list all the top football bookmakers with bonuses for new players.

Early Payout Offer

  • Football League Winner Bets Early Payout.
  • If your Football Team is winning in the League by 10 + Points.
  • Win Outright Bets.
  • Selected Football Leagues.
  • UK & Ireland customers only.
League Winner Early Payout Offer Get your bets paid out early if the team you back takes a lead of 10 points or more in their league. Applies to bets on the To Win Outright market on selected leagues up to and including 13th Spetember 2019. Bet restrictions and T&Cs apply. New and eligible customers only.

Double Winnings if Penalty Scored

  • Double Winnings on selected Football matches/markets.
  • Opt-in required. UK/IRE customer only.
  • Max stake £/€20. Max free bet £/€500.
  • 1st pre-live single bet on selected matches.
  • Free/Cashed out bets don't qualify.
  • Free bet expires after 7 days.
Bet £10 to get £40 in Free Bets
18+. Min stake £10. Min odds Evs. First bet only. 30 days to qualify. Free bets expire in 7 days. 20x wagering requirement & max win cap £250. 14 days to accept Casino bonus. Once accepted it is active for 3 days. Cashed out bets won’t apply. Payment method restrictions. IRE/NI customers only. T&Cs apply ⇓ **18+. Opt in. UK/IRE customers only. Max Stake £/€20. Max free bet £/€500. 1st pre live single on selected markets. 90 mins only. Free/cashed out/combined Odds bets won’t qualify. Free bet expires after 7 days. T&Cs apply.

Latest Betting News

Top Rated Bookmakers

Rank
Site
Bonus
Rating
Visit
1
100% up to£100
Up to £100 in Bet Credits for new customers at bet365. Min deposit £5. Bet Credits available for use upon settlement of bets to value of qualifying deposit. Min odds, bet and payment method exclusions apply. Returns exclude Bet Credits stake. Time limits and T&C's apply.
2
400% up to£20
T & C Apply. 18+. UK+IRE only. Min first bet £5. Must be placed within 14 days of account reg. £20 credited as 4 x £5 free bets. Not valid with CashOut. Free bet valid for 4 days.
3
300% up to£30
New UK & NI customers only. 18+. Sign up using promo code ‘SPORTS60’. Deposit & place first sports bet at a minimum of £10 in one bet transaction at evens (2.0) +. £30 paid in free bets within 48 hours of bet settlement, expires 7-days after issue. Offer not available to those registering on 06/04/2019. E-Wallet & Prepaid Card restrictions apply. Your first bet must be settled within 60 days of bet placement. SMS validation may be required. Game restrictions apply. Maximum 30 Free Spins on selected games. Free Spins expire after 7 days. Full T&Cs apply.
4
100% up to£25
18+only. General Promotions Terms Apply. Offer for UK new customers only and have to be KYC verified. Maximum £25 free bet and Minimum of 3 selections in a accumulator is needed. there are minimum odds per selection of 7/10 (1.70). Your Free bet stake is not returned. Certain Markets/sports/payment methods restrictions apply. The Qualifying bet must be made within 30 days. Free bet valid for 30 days. Full T&C's apply.
5
50% up to£50
New customers only. Min Deposit £10. Deposit & bonus amount must be wagered 6 times (min odds 4/5) prior to withdrawing bonus funds and any winnings. Wins from real money bets withdrawable at any time. Bonus on sports betting only. T&Cs apply.
6
100% up to£10
New customer only, Max one £10 free bet, Qualifying bets must be placed at odds of 2.0 (1.1) or Greater, Paid as bonus token with min odds reg, T&C Apply. 18+ only.
7
100% up to£10
18+. New and selected customers only. Opt-in and £/€10 min deposit required. 1 x wagering required before withdrawal. Additional terms apply.
8
100% up to£10
New customers only. Min. deposit £10 (no Skrill/Neteller). Deposit must be wagered 1x at 1/2 (1.5) odds or higher (bonus is wager free). 18+. T&C's apply.
9
100% up to£100
New Customer offer. Place 5 x €10 or more bets to receive €20 in free bets. Repeat up to 5 times to receive maximum €100 bonus. Min odds 1/2 (1.5). Exchange bets excluded. T&Cs apply

Popular Questions and Answers

Learn more on the best betting sites out there and let us help you choose the best online bookmaker for you. We have many years of betting online and using the best sites. We can pass on our gambling knowledge to you and help you in selecting the best betting site. In 2019 the UK Gambling Commission introduced more regulation and rules. This in turn makes the online bookmakers even more accountable to offer a fair and transparent service to UK punters. All the best betting sites are licensed by the UK Commission and governed by their rules. This makes the UK bookmakers a more safe, secure, fair and of course legal place to place your money and bet.

I have answered the most popular questions that get asked about gambling sites below. I hope you find it useful and if you have any question not listed feel free to email me at [email protected]

Which Betting Sites offer Cash Out?

These are the best online bookmakers to offer Cash Out.

Rank
Site
Bonus
Rating
Visit
1
400% up to£20
T & C Apply. 18+. UK+IRE only. Min first bet £5. Must be placed within 14 days of account reg. £20 credited as 4 x £5 free bets. Not valid with CashOut. Free bet valid for 4 days.
2
100% up to£20
New customers only. Turnover Requirements are x 7 of your deposit and bonus amount. The bonus expires after 30 days. 18+ BeGambleAware. Full terms apply.
3
100% up to€/£50
New Customers; Min. deposit £15 (no Skrill/Neteller); Bonus amount is 50% of deposit up to €/£50; 8 x deposit and bonus turnover (min. odds 4/5 on singles and 2/5 per selection on acca bets), in 30 days, for bonus release; Some bet types don’t contribute to turnover; Withdrawal before turnover results in bonus cancellation; Terms apply, 18+
4
100% up to£100
New Customer offer. Place 5 x €10 or more bets to receive €20 in free bets. Repeat up to 5 times to receive maximum €100 bonus. Min odds 1/2 (1.5). Exchange bets excluded. T&Cs apply
5
100% up to£100
Up to £100 in Bet Credits for new customers at bet365. Min deposit £5. Bet Credits available for use upon settlement of bets to value of qualifying deposit. Min odds, bet and payment method exclusions apply. Returns exclude Bet Credits stake. Time limits and T&C's apply.
6
300% up to£30
New UK & NI customers only. 18+. Sign up using promo code ‘SPORTS60’. Deposit & place first sports bet at a minimum of £10 in one bet transaction at evens (2.0) +. £30 paid in free bets within 48 hours of bet settlement, expires 7-days after issue. Offer not available to those registering on 06/04/2019. E-Wallet & Prepaid Card restrictions apply. Your first bet must be settled within 60 days of bet placement. SMS validation may be required. Game restrictions apply. Maximum 30 Free Spins on selected games. Free Spins expire after 7 days. Full T&Cs apply.
7
50% up to£5
New Customers only and applies to your first settled bet. Bonus paid out as a Bonus Token. Minimum Odds of your bet must be 2.0 and requires exact stake of £10. No E-Wallets for deposit allowed for Bonus. 18 +. Full T&Cs apply Begambleaware.org.
8
100% up to£10
New customer only, Max one £10 free bet, Qualifying bets must be placed at odds of 2.0 (1.1) or Greater, Paid as bonus token with min odds reg, T&C Apply. 18+ only.
9
100% up to£28
T & C Apply, 18+, Begambleaware.org
10
100% up to£30
T & C Apply, 18+, gambleaware.co.uk
11
300% up to£30
New William Hill online customers only. Min. unit stake of £10/€10 at odds of 1/2 or greater. Only the “win” part from EW bets will count. Free bet terms, payment method & country restrictions apply. Free bets credited as 3 x £10/€10. Free bet stakes are not returned as part of the settlement of successful free bets. All Free Bets must be wagered within 30 days.

The Cash Out feature offered by many online bookmakers means you can take any winnings before the end of the event. Instead of waiting for your acca bet to complete for example and potentially lose your profit, you could cash out any winnings beforehand. The Cash Out feature puts you in the driving seat and puts the call on you. Do you Cash Out and take your profit or let the bet run and either win even more or lose it all?.

What Betting sites accept PayPal?

I have listed the best bookmakers that accept PayPal below. If you are searching for even more betting websites that offer the service then visit our dedicated page on the subject which has a complete list of sites.

PayPal is fast becoming one of the punters favourite ways to move money from their bank account to their betting site. It's instant and easy to set up at a bookmaker site. Simply register your email paypal address and you are ready to make your first deposit. All withdrawals you make from your winnings are instantly credited to your paypal account too. It's super east to set up and use and there's no fees applied from the bookmaker. Although there is always the odd exception like Betfair.

What Betting sites use Boku?

I have listed the gambling sites below that accept Boku as a payment option. The payment option allows you to bill your deposits to your mobile phone bill instead of using a more conventional method like debit or credit card.

  1. Boylesports
  2. Netbet Sport
  3. Betfair *
  4. Bet365 *

Boku is a mobile payment service that bills your deposits and transactions to your mobile phone bill. So instead of using a debit, credit card or other more recognisable online banking methods you can make deposits to your bookmaker via your phone bill account. All costs are billed directly to your mobile phone. The service is available for online services like subscriptions, betting on sports and casino and general gaming. * Boku deposits are accepted via Neteller at these websites.

Which UK Betting Site is the Best?

Bet365 Offer

£100 in Bet Credits

Bet365 Best betting site

Our Choice of Best Betting Site offers £100 in Bet Credits for New Players

Bet365 Open Account Offer Up to £100 in Bet Credits for new customers at bet365. Min deposit £5 and 1x settled bet requirement to release Bet Credits. Min odds, bet and payment method exclusions apply. Returns exclude Bet Credits stake. Time limits and T&Cs apply..

Of all the betting sites online, and there are many, for the best gambling experience we rate Bet365.com as top of the pile. You get the full package at Bet365 online. The bookmaker comes tops for choice of sports markets, types of bets, promotions, customer service and players satisfaction. There's every feature you would expect from a best betting site including live streaming sports, in-play betting, cash out and plenty more. Add the Bet365 generous sign up bonus and we think the Bet365 betting site should be every bettors first choice of bookmaker.

Which Betting Sites give Free Bets?

These days almost every bookmaker I can think of will give you a sign up bonus of some sort. The only exception is Pinnacle.com. That bookie offers instead the promise of better odds by way of tighter margins offered by their odds compilers. To see a complete list of online bookmakers and their welcome offers visit our page here.

A free bet of course doesn't exist as such. There are always requirements needed by you, the player, before the bonus amount is released into your account. An example would be that you have to bet £5 first of your own money in order to receive £20 in free bets. There are always full terms and conditions attached to all free bets or bonuses so it's best to be fully aware of these first. Restrictions on deposit methods and free bet expiry terms are the some of the most noteworthy. Most sign up bonuses though are a welcome way to try out the bookmaker so it's useful to place a bet or two with your bonus money first.

Which Betting Sites have Live Streaming?

Rank
Site
Bonus
Rating
Visit
1
100% up to£100
Up to £100 in Bet Credits for new customers at bet365. Min deposit £5. Bet Credits available for use upon settlement of bets to value of qualifying deposit. Min odds, bet and payment method exclusions apply. Returns exclude Bet Credits stake. Time limits and T&C's apply.
2
300% up to£30
New online customers only, min £10/€10 stake, win only, min odds 1/2, free bets paid as 3 X £10/€10, 30 day expiry, free bet/payment method/player/country restrictions apply. See full terms below.
3
100% up to£100
New Customer offer. Place 5 x €10 or more bets to receive €20 in free bets. Repeat up to 5 times to receive maximum €100 bonus. Min odds 1/2 (1.5). Exchange bets excluded. T&Cs apply

Live streaming is a great way to enjoy the running of your bet even more. To watch the action unfold while hoping for your bet to win on the event adds more value to your wager. Not that many bookmakers offer live streaming so it's good to pinpoint the ones that do. In our opinion the most comprehensive live streaming service offered by a bookmaker is undoubtedly Bet365. You will need to have a funded Bet365 account and to have placed a bet in the last 24 hours to qualify for watching live streaming for free. However there are other betting sites that offer live stream and I have listed them above.

Why do Betting Sites need your Address?

When you sign up for a bookmaker account you always need to create a username and password and you also need to verify your identity by giving your full name and address. This is even more essential today with increasing methods of fraud online.

The bookmakers are no different to any other online organisation they need to prevent fraudalent accounts not least to prevent money laundering. As the saying goes if you've got nothing to hide then providing an address shouldn't be a problem.

The online bookmakers are ever more accountable to the UK Gambling commission these days. If the betting sites are found to be accepting money from unscrupulous individuals they can get their UK license revoked.

The providing of an address helps the bookmakers to verify your identity it doesn't mean you'll receive mass mailings from them. So it's nothing to be concerened about and is simply part of the identity check to make gambling a safer enviroment for everybody online.