What lamps available in the UK are compatible with BS 546 plugs?
Power (Watts) = Potential (Volts) x Current (Amps).
At 230 Volts a 40 Watt bulb uses 40/230 = 0.2 Amps. So a 5 Amp circuit will have no problem supplying this lamp.

Your choices are


Change the plugs on your lamps.
Use an adapter.


Changing the plugs is not difficult and should be within the competence of many people. If not you can probably find an electrician who will do this for minimal cost.


From a well known trade/retail store

Note that BS546 plugs are mostly not fused. I believe they should only be used on BS546 radial circuits that are individually protected at the fusebox ("consumer unit")

A few fused variants are available:


from an online retailer

If you can find a source, you can buy an adapter



 From Museaum of plugs and sockets