Some time ago I fitted a new socket outlet in my son's bedroom. I had
no desire to go into the wall and hook into the existing ring main so
I decided to tap in somewhere else. Basically I tapped into the
immersion heater supply in the airing cupboard, (fused 30amp at the
consumer unit). Then I went through a 13amp fused spur, then up into
the attic, and then down into the bedroom using mini trunking, and
finally connected an RCD protected double socket. Everything fine.

Now I need to do the same in my daughter's room. My question is, if I
wire in parallel from the feed to the socket in my son's room do I
need to use another RCD protected socket? Or will the RCD in my son's
room provide protection for a regular parallel socket.

Safety is paramount of course but I don't want to spend 20 odd quid on
another RCD socket if I don't need to.

Incidentally the sockets are only for hi-fi/TV so I doubt the combined
load will ever exceed 5 amps.

Thanks