On Wednesday I bought about 5 Euro worth of LPG from an automated pump at Le Clerc. Today I went to get some cash out of an ATM and was told that I was trying to exceed my limit. It was only 100 Euro and I knew I had the funds to cover it. Upon looking at my account online I saw that I did indeed have a balance of over £100, but only £12 of it was 'available'. I phoned Nationwide to find out why I couldn't withdraw up to the amount of money in the account. The helpful agent told me that Le Clerc had 'earmarked' £102 worth of my money when I paid for my LPG and hadn't yet released it. I know when you go to an automatic pump it validates your card and authorises you to fill up to a certain value. But why doesn't it release the surplus funds immediately after you finish filling up? NWide said they could free up the money, on condition that if Le Clerc claimed it, they would have to corrall it again. Is this unethical process common? How long do these supermarkets hold onto your money?