We recently had an electrician in who said we have a very old and the original electricity supply box, even though we have a smart meter. He described it as “a biscuit tin” and it needs changing because it will be increasing the amount of energy we use. I have attached a picture of what it looks like.
Who would I contact to change this and can they do it as I don’t want to be charged more than necessary, especially as all other costs are increasing.