Somerfield supermarket is just around the corner from work and I pop in there for odds and ends, milk, bread etc,(never a big shop). Browsing my online banking just now, I noticed a debit from Somerfield for £40.76, which I know is not possible (more likely to have been £4.76)! unfortunately I punch my pin number without ever checking the amount! I don't have a receipt, do I have a leg to stand on?