A small point for all of you "dissing" the UK ring main.
Most washers, dryers & dishwahers on the UK market now, do not exceed 2.4/2.5Kw.
Kettles, toasters, microwaves etc are only on for a few minutes at a time in normal residential applications. Obviously dedicated circuits should be installed on commercial / guest houses / hotel washers & dryers, but they are often more than 13A or 3 ph anyhow.
