Actually a funny storey about that. When I asked the network suppliers to change the cut-out for some reason they asked if I new what sort of fuse I had in it. BG had been round earlier to fit the smart meter so I took a few pics while he had the fuse out. Sent them to the network supplier and whooooo blimey did I get a roasting. They thought I had popped the fuse myself lol. But hey guess what. Nothing happened. Nadda.