Hi folks,

I recently moved into a flat that, as well as having 'standard' modern
plug sockets, also has some older ones, with holes for three round pins.
I have no idea whether these are live, and guess that I could use one of
those mains tester plugs in order to check whether they're wired up
correctly, but:

a) Are they potentially usable?

b) Are there adapter plugs available to plug in equipment with new-style
plugs ... or replacement plugs to connect to the equipment, perhaps?

Any advice would be appreciated -- my knowledge of such things is
sketchy to say the least!

Thanks,
Stuart.