So if you have a Coral account, from time to time, they will offer you a £5 casino bonus. If you accept this you can withdraw nothing from your account. You can have £1000 in your account and it doesn't matter. Now the great thing when you have used the bonus and satisfied all conditions they do not remove this restriction from your account. You have to contact them (three times in my case) just to be able to withdraw your money.
Why do Corals treat punters like this? Because they have no idea how to treat you in a fair and decent way