Bill Payer wrote:

Well, this is rather the point in doing the job in the first place, ie, we
don't have enough sockets.

Bear in mind that adding more sockets isn't likely to significantly increase
the loading which is dependent on the number and power rating of the
appliances you use. So, unless you intend to get lots more high power
appliances, adding more sockets to the existing ring won't be a problem. In
fact it will probably make the whole installation much safer if it means
using less multiway adaptors and trailing extension leads.

--
Mike Clarke