UK players have moved from paying by phone bill, which often capped deposits...

https://page-wiki.win/index.php/Is_It_Normal_for_UK_Casinos_to_Be_Debit-Card_Only_After_2020%3F

UK players have moved from paying by phone bill, which often capped deposits around £30, to Faster Payments and mobile wallets. These modern options make it easier and quicker to deposit as little as £10