The BS4343 plugs and sockets - well, EN 60309 nowadays
- are
colloquially known as "commando" plugs. I have no idea why.
'Commando' is the trade name used by MK (a large manufactuer of UK
electrical fittings) for that range of commectors. In the same wat that
their stanard white plastic light switches and sockets are 'Logic', their
consumer untis (fuseboxes...) are 'Sentry' and so on.
I must admit that although I've got an MK catalogue somewhere and had
come across that name, I was a little confused when I went ot an
electifcal wholesaler and asked for a '110V 16A BS4343 plug' and the
salesman said 'Do you mean a Commando plug?' Fortunately he showed me one
amd I said 'Yes, that's what I want'/
-tony