When I get to doing the kitchen here It'll have below worktop
unswitched sockets for appliances fed from a grid switch panel
fitted with 20A DP switches in the room, fuses for each socket
also mounted in the grid, I think not thought to hard about
this yet...

This is what I did, except there is no need for fuses in the grid switch. It
is better to have only the fuse in the plug top. The grid switch is fed from
a dedicated 32A 6mm radial and feeds only a w/m, d/w and t/d.

Christian.