UK players used to top up casino accounts using phone bill deposits, typically...

https://fun-wiki.win/index.php/Is_There_Any_Reason_to_Choose_Bank_Transfer_Over_PayPal_for_Casinos%3F

UK players used to top up casino accounts using phone bill deposits, typically capped around £30 per transaction. Now, Faster Payments and mobile wallets let them deposit as little as £10 instantly