There is still call for this product, it was common practice to install
> these 5A Sockets for lighting points before the introduction of plug in
> ceiling roses (or LSC to BS 7001 & BS 6972), the BS spec for these 5A
> sockets is BS546.
Yes, it's still permitted to fit BS456 round pin socket outlets.
All reputable manufacturers now make them with a shutter (mem250, Crabtree > MK etc)
They have to be shuttered when used in residential premises, but don't have to be shuttered otherwise.
Their main use nowadays is in hotels as a lighting socket for table lamps
> and the like
I have used the 2A ones as wall outlets for lights switched at the doorway.