Foxy is one of my absolute favourite bingo sites and they have an incredible welcome offer at the moment. All you need to do is deposit a tenner and they'll give you a whopping £40 bonus to play with.
The most I've won with a free bonus is £162 and I bought myself a TV with the winnings. What a great day that was!
New players only, 18+. Min deposit £10. Max bonus £120. x4 wagering requirements apply to Bingo bonus, real money not subject to wagering requirements. Further T&Cs apply.