Support Google Wallet not accepting debit cards? (UK)

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http://androidforums.com – I read fairly recently that google wallet now accepted debit cards along with credit cards. I really don't want my credit card linked as I have a debit card I use specifically for online purchasing and such. I prefer to be able to transfer a set amount into the account and know I can't eat away at my credit card. So I wanted to buy something from the play store today so tried to setup my debit card. The box asked for a credit card or DEBIT card number but once entered, it said it wasn't a valid credit card. I tried another just to be sure and it still didn't accept it? Is this yet a (General)