Light switches by MEM.
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.
Both the switch and the plate have the moulded 'MEM' logo and state 'MADE IN ENGLAND'
Other wording on the switch is '5AX 250V, A.C. ONLY, UK PAT., BS 3676
5AX refers to the rating of 5 amps, X indicating suitable for inductive loads such as fluorescent lighting.
The red and pink material on the edge is the remains of paint and wallpaper.