Lightswitches and sockets made by MEM.
Probably made late 1960s or early 1970s. These are the same size as modern lightswitches, and the fixing holes are the same spacing. It is therefore a simple task to replace switches like this with new ones - provided the circuit wiring is still in good condition..
From the same era as the switches above, a single socket outlet with switch. Note the central MEM logo.