Electric socket wiring

[touch]

I have this double socket with 3 wires connected to each terminal:

I want to move it from where it is (about 20cm from the floor) to halfway up the wall so it'll be behind my wall-mounted tv. The cables to it at the moment are routed under the floor and there isnt enough slack to reach where I want.

If I get a length of cable to reach from the current socket location to the new location, how do I join it? I suppose I could just use terminal block but is there some kind of junction box that will join 4 x 3core cables together?

 

[touch]

just a terminal junction box will be fine. or you could cut cable under floor, juntion box and run a spur up behind the tv, leaving that socket in place. just dont spur off that socket as it has been spurred off already.

Ok, I see. This socket is probably the closest to the consumer unit so are the 3 connections likely to be a main supply from the unit and a ring/spur in each direction?
So I need to figure out which connections are for the spur and connect the new socket inline with one of them?

I'd use wago connectors rather than terminal block if you going to dump it somewhere in accessible like under the floor as terminal blocks have a nasty habit of working loose over time!

Yep, once this socket is removed i'm going to plaster over it so any connections I make here will be difficult to change later.

 

[touch]

Thanks for the help everyone.

Ergh I read it as he was moving the lot vertically not creating a spur

Essentially, yes. There isnt enough free cable to simply move it though so I needed some sort of connection + addition of some new cabling.

Here is a quick diagram of what I think I need to do:

The black lines are the existing cables and the red lines are new cables i'll put in to wire it inline with the ring. Does this look correct?

 

[touch]

Update: it's done. Thanks for the help everyone.
It turned out that the extra connection was a spur which went up the wall so that made things easier. I just had to extend the 2 ring connections to move the socket higher and reconnect the spur from the new location. Essentially, exactly the same configuration as before but with a little extension added.

(Ignore the wet paint around the old socket location and missing skirt )

edit: i used wago 222 series connectors for joining the cables. Brilliant things, easy to use and make a good solid connection.