I have arranged to have my gas and leccy meters changed for the Smart versions. As I don't have an isolator upstream of my consumer unit, I thought it would be a good time to have one fitted, so enquired if that could be done at the same time if I supplied and mounted a suitable isolator in the cabinet.
The reply from my supplier astounded me - Their engineers are only trained to swap the meters, they are not qualified to do anything else. Swapping meters is likely the most dangerous job on a domestic installation, with some very serious safety implications if they do get it wrong.
They indicated they would need to engage another 'specialised engineer' to do it, at a cost to me of £70. Good grief what is the world coming to?