Where is the best place to play bingo online in the UK?

The simple answer is nowhere. There is no "best place" to put your money in a bin. No one ever wins at bingo long term. If you insist on playing go with a big name, they are least likely to steal your deposit (that's right... it happens!). Do me one favour, keep track of your deposits and your wins. After a few months add them up, you will have lost money, that much I promise. Go to a bingo hall, at least you get the social side of it.