UK players are moving away from phone bill deposits, which often had limits...

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

UK players are moving away from phone bill deposits, which often had limits like £30 per transaction and added fees. Now, Faster Payments and mobile methods let users deposit from as little as £10 instantly and without extra charges