I bought two Grimshaw guitars from the man himself in his somewhat plush Piccadilly offices and workshop(later he moved into some backstair den in Soho behind Piccadilly Circus). Actually I ordered his next top cello model (called something like Ambassador) but decided it was too weak-sounding due to too much embellishment, so I got him to arrange for me to have two guitars instead, one was something like a lightweight classic Martin and was called a 'Troubadour' - the other a short-scale electric (see here if you're interested: http://home.no.net/rrpriddy/Nos/Grotto%20%20Club%201958%20to%201959.htm).
I had much trouble with the neck bending with both models - the truss rod didn't improve things much. Grimshaw repaired it twice, but it was very unsatisfactory. I ended up having to pay for repairs myself and actually gave him the 'Troubadour' for a neck replacement on the short-scale one! (I was green about business and he was a smart salesman!).
I recall he had a guitar-playing assistant and workshop engineer called Tony. He once invited me to join a trio he was starting - but it was not so interesting as it would be playing mostly for amusement and only Grimshaw compositions from the dots. I wanted to improvise!

This Emile Grimshaw was probably in his '50s... and was the son of the famous founder of the banjo and guitar business. He was still putting out a magazine called the BMG (Banjo, Mandolin, Guitar) and he had a large selection of sheet music for guitar - both for solo and duets etc. A lot of Eddie Lang and Roy Smeck solos were transcribed, and many other interesting pieces (I used to play 'String Along', I recall).
I'd be interested if anyone knew of the sheet music - whether it is available anywhere at all. This could be something great to put on-line!