UK players have moved from using phone bill deposits, which often had limits...

https://www.romeo-bookmarks.win/uk-players-used-to-top-up-casino-accounts-easily-via-phone-bills-but-now

UK players have moved from using phone bill deposits, which often had limits like £30 per transaction, to Faster Payments and mobile wallets. These modern methods let you deposit as little as £10 instantly