In article ,
"Owain" writes:

Also was interested to see that B&Q are selling, I think MK brand, round-pin
plugs that aren't sleeved. One of the packages said "suitable for table
lamps" so I think it's clear these are intended for domestic use rather than
stage. I thought that unsleeved pins even on round pin plugs was illegal
now, but wasn't so sure of my grounds so didn't raise that this time.

BS546 plugs don't have sleeved pins.
Contact is only made in the socket in the final few millimetres,
and that combined with a minimum distance from the pin to the
edge of the plug makes them IP2X (British Standard finger proof).

The only special requirement is that the sockets must be shuttered
for domestic use. Unshuttered sockets can be used in commercial/
industrial situations. The square plate sockets MK make are, but
the BESA box sockets (which I doubt anyone still makes) weren't.

I use the 2A BS546 sockets for table lamps which are switched at
the door and run from the lighting circuit. I use the Klik sockets
for fixed equivalents, like under cupboard lighting. Before these
existed, I used clock points for the same purpose.

--
Andrew Gabriel