I have recently knocked 2 bedrooms in to one and now i am left with 2 wall sockets connected together with a very short piece of cable. My problem is that i need the 2 sockets mounted on a wall and the current cable falls short by about a foot. How can i extend the ring main? Can i use a junction box a situate it under the floor boards? If so what type of junction box do i use? can i legally do this work or do i need a sparky to do it? Any help will be much appreciated.