UK players used to rely on phone bill deposits for small amounts, often capped...

https://wiki-spirit.win/index.php/Are_Apple_Pay_and_Google_Pay_Available_for_UK_Casino_Deposits_Yet%3F

UK players used to rely on phone bill deposits for small amounts, often capped at £30 per transaction. Now, Faster Payments and mobile wallets let gamers move money instantly with no hidden fees