UK players used to deposit £30 or more through phone bills, which was slow and...

https://sierra-wiki.win/index.php/What_Replaced_Pay-By-Phone-Bill_Deposits_at_UK_Casinos%3F

UK players used to deposit £30 or more through phone bills, which was slow and limited. Now, Faster Payments and mobile options let them add funds instantly with as little as £10