what I cant understand tho is the bloke before rewired most the
house (Even the lighting circuit) but the *ickhead rewired the lighting
circuit in 2 core with no earth!!! Presumably because he had some lying
around!

Or more likely because it was rewired befor lighting circuits actually
had an earth.

Or did it long enough ago that relying on the metallic conduit for earth
continuity was still an Acceptable Method (or was harking back to the
days when it was ;-)