The message .com
from "Fitz" contains these words:

All depends on how you assess risk doesn't it? Electrocution through
inquisitive sticking of implements into sockets or even plugs with
fingers wrapped round the back probably has a very low likelihood, with
very severe consequences. When you can eliminate that likelihood
altogether through a one of cost of under a fiver I personally think
it's worth doing.

Eh? For a start, all UK plugs have had sleeved pins for many years, so
you can't reach round the back and actually touch live metal because by
the time it's exposed it's no longer connected. Except the earth pin, of
course.

Secondly, if there's a plug in there, then perforce there isn't a socket
cover in there. Socket covers are about empty sockets, not sockets with
plugs in.

Thirdly all sockets are shuttered. I defy you to find one that isn't.

Fourthly, in the vanishingly unlikely event of some little sprog
managing it the RCD will ensure they only get a belt strong enough to
scare the living daylights out of them rather than kill them. It worked
for me when I was about five. Except that was a table-lamp.

They're a gizmo sold by profiteering safety types who prey on the
insecurities of parents and the paranoia of safety departments who
insist on them for no good reason. I've had a good look over the years
and have never found any evidence of accidents happening which would
have been prevented by socket covers.

If you have evidence to the contrary, I'll a) be amazed, and b) have to
buy a hat to eat.

--
Skipweasel
Pay no attention to that man behind the curtain.