Open an account with Blue Square and place a bet of £25 or more and they will give you a free bet of £25. Plus after a further 10 bets of £25 or more they will give you a £25 Bet Bonus!

Multipe account detection: Average
Concession conversion: Fairly easy, often best odds especially close to event starting
Account closure/restrictions: Quite good.  Can win a few big bets before restricting start.