It's all computerised. If the till won't take the coupon there's no way to override it. However, you can ask them to save the transaction and get something else as well as/instead of them pay at Customer Services, they can just scan the saved receipt and add your extra item. As for anyone who thinks cashiers are "drippy jobsworths", supermarkets will be hiring for Christmas soon - how about trying it from the other side of the fence?
New series of *This city is ours* on iPlayer now





