Further to the discussion about the BBC Mark III desk, we really had no excuse. We all had copies of this manual, commissioned by Liam McCarthy (Managing Editor) and compiled by Jeff Link who wrote the text and provided the artwork.
At the moment (March 2017) part of one of the Radio Leicester Mk IIIs is on display at 9 St Nicholas Place as part of the build-up to the 50th anniversary celebrations. The Sonifex cartridge players have been a subject of considerable discussion on social media.
A footnote to my earlier comments about the Mk2 desk - The first time I used one was at BBC Radio Bristol when I was operating for Kate Adie, then the presenter and producer of the mid-morning sequence. This was before I came to Leicester. She was very gracious in dealing with my operational inadaquacies.