In article ,
"Christian McArdle" writes:
There is already a spur connected to the ring so I need to include the new
socket on the ring and not as a second spur.

You can have as many spurs as you have accessories on the ring.

I suspect the thinking is that a ring circuit is usually initially
installed with no spurs (or very few at most). If you start reaching
the point where you have as many spurs as original outlets, then
you should be rewiring the ring to meet your current requirements,
and not continuously extending one which obviously falls far short
of your current requirements.

Strictly, this is just a recommendation in the On-site guide.
It was removed from the wiring regs, IIRC when 16th edition first
came out.

You may only
take one spur off each individual accessory. (i.e. you can't take two spurs
off a single socket).

There is no such restriction. In practice, getting 4 wires into
a connection on the back of a socket can be a challenge, but it's
not impossible given a good quality socket and a deep back box
for the extra wires.

You should avoid adding large loads near one end of a ring circuit.
In this case, take the spur from the ring circuit fuseway.

--
Andrew Gabriel