I always chuckle at thé 'shavers only' socket, but then i have a fithy mind.shaver socket possibly
They are ok so long as you make sure the contacts are tight. They are used on double insulated appliances that don't require an earth. Just as rasy to chop the plug off and fit a 13amp plug . All appliance plugs have to have a moulded plug now because no one is taught how to fit a plug. It's horrifying to see some of the attempts by people with long stripped wires, wires on the wrong terminal, aluminium foil for a fuse and missing terminal screws. Don't get me started on Sellotape holding the tops on because it's broken or the screw went awol.