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

https://wiki-legion.win/index.php/Do_I_Need_to_Download_a_Casino_App_to_Deposit_on_Mobile%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