Sorry Jim,

the Carthy film was the first music doc to be made for the BBC 4 series and the then existing guidelines for end credits were ridiculous (ie. 20 secs max). Alison (and some other important contributors) should of course been credited but were not. Apologies apolgies apologies.
The broken guitar on the armchair is the Gibson featured in the early photo montage of Martin.
It is the Fylde (in Martin's dulcimer tuning, all Cs and Gs I believe) on the splendid Dominion of the Sword.
Martin's acting career has been described accurately by this thread. He appeared briefly as a lift attendant in a British thriller called "Stranger on a Train". I tried very hard to obtain this clip but failed. He tells a very funny story of multiple takes of his one line scene. They had changed the name of the character Martin was addressing without bothering to tell him.....
The 'Battle of Waterloo' was a BBC Pebble Mill live drama event and Martin says he found his identification with the role so harowing that he would not act again.
Thanks for the kind comments fellow fans.....