I'm putting in a built-in bookcase into the sitting room alcove and there's a 2 gang socket where the side of the bookcase will be. There'll be a 30mm gap between the bookcase and the wall and this will be covered up at the front I want to drill a small hole in the side of the bookcase and use a rewirable extension lead for power supply. The socket in the wall won't be accessible so I want to put another fuse on the extension lead where it is accessible. Apart from daisy chaining two extension leads, is there a way to add another fuse onto the extension lead where it can be easily accessed? I was thinking of something the size of a table lamp switch but cant find anything like it.