UK players used to rely on phone bill deposits, typically capped at around £30...

https://weekly-wiki.win/index.php/What_is_UK_Finance_and_Why_Does_it_Matter_for_Casino_Deposits%3F

UK players used to rely on phone bill deposits, typically capped at around £30 per transaction. Now, Faster Payments and mobile wallets let users add funds quickly with as little as £10