Dear Mark Dowding,

The Peterborough instrument maker you mention would be the Terry Warrington - all round great bloke - last time I was down there he was still singing with his wife, Florence.
Years ago another great Peterborough bloke, Alan Twelvetree (organiser of P'boro Folk Club in the 60s), claimed to have taught Alan Smethurst some chords on the guitar.
I thought that Mr Smethurst had died about 30 years ago (in P'boro) - maybe not? I sense a mystery here.