There's some cracking racing in store at Cheltenham and Doncaster this weekend, and bet365 customers can be sure of getting extra value for their money.

Back a winner at 4/1 or bigger in any of the six races televised live on Channel 4, and bet365 will give you a free bet to the same stake (up to £50 per customer per race) on the next live Channel 4 race.

For example, have £50 on Silverburn in the 2.30 Cheltenham and, providing he wins at 4/1 or bigger (currently 5/1), have a £50 free bet on the 2.45 Doncaster, the next live Channel 4 race.

What's more, bet365 are offering Best Odds Guaranteed on every race. So, take a price on your selection, and if the SP (starting price) is bigger, get paid out at the bigger price.

For example, Silverburn wins at 7/1 after you've taken 5/1 on the day of the race. No problem - bet365 will pay you out at 7/1!

Even better, back him for free by registering with bet365 and placing one qualifying bet of £5 or more. You will then be entitled to a free bet to the same stake (up to £25), with another £75 free bets to be earned in much the same way.

Visit bet365 to register and place your free bets.