Adding a spare off 13a FCU

[hazy]

I need to add a additional socket to a cupboard under my stairs the nearest socket to this location is my kitchen this is a single socket (below couner) controlled by a FCU 13a (above counter) Can I spare of this? Is it okay to have potentially three sockets if I add a double. Off one 13a FCU.
Also as this was behind my fridge I was just planning on running the cable on the surface in some conduit would this be okay?

 

[Doghouse Riley]

Hi and welcome

It's possible to run a spur from any socket, you're attaching the cables to the ring main not the socket. Make sure you use cable suitable for 13amp use.