In message , Andy pandy
writes

Should you have no suitable adjacent units for what ever reason, then
sink a back box into the wall behind the appliance (appropriately
placed to afford the best clearance depending on the form of the back
of the appliance) BUT put this socket on a spur to a switched fuse
unit (on the ring) above the work top!! In line with the double
sockets above the worktops.


No need for FCU here (thought it won't hurt), the plug will be fused, so
a 20A switch is fine.
--
Chris French, Leeds