I don’t suppose this would be any good? The chap is 88 and wants to be able to unplug it. I think he may panic otherwise. I got a 10 pm call out from him the other night saying his kitchen was flooded. When I got there the cupboard was a bit wet and needed a Tupperware to catch a slow drip! https://www.screwfix.com/p/lap-1-gang-13a-sp-switched-plug-socket-white/32767
If he's a bit doddery, I think an FCU would be better, rather than him faffing with a plug with wet hands. However...
As it’s in a cupboard I would just put a plug on it you could change it for switched socket if you want.