You're welcome.Thanks JohnW2
I perhaps should have added that, due to some not necessarily totally rational aspects of (non-mandatory guidance in) the regulations, there is a potential problem when the socket(s) are supplied as an 'unfused spur' from a ring circuit. In that situation, the (guidance in the) regulations say that one can have one (single OR double) socket supplied by the spur, but (by implication) not two singles.
Kind Regards, John