I live in a rental house with prepayment meters for gas and electric, so we are already paying more for energy and can't have the meters removed. We top up weekly at a local shop and have done for a long time. Got there today to top up and they informed us that they are now adding a 50p admin fee for topping up. (We were paying cash and didn't have the 50p so they were nice enough to waiver it). I don't know if the shop lose money on prepayment top ups and I'm not angry with them. I'm just annoyed that once again prepayment meters, which are often used by people already on a low income, are going to cost us more again. Am I just being petty?