UK players used to top up casino accounts with phone bill deposits, often...

https://charlie-wiki.win/index.php/What_Deposit_Methods_Does_MrQ_Support_on_Mobile_Right_Now%3F

UK players used to top up casino accounts with phone bill deposits, often limited to around £30 per transaction and charged high fees. Now, Faster Payments and mobile wallets let users deposit from £10 with instant, low-cost transfers