Now almost any small appliance can be connected to the lighting circuit.
This GOLTONE branded adaptor has a BS52 bayonet socket on one end, and a BS372 two pin socket on the other.
This enables any appliance with a 5 amp 2 pin plug to be connected into a light fixture.
This would be useful if some rooms in a house had 2 pin socket outlets and others did not - the same appliance could be used in all rooms.
A similar adaptor, this has no brand name or any markings at all.
It is significantly longer than the Goltone one.