Sorry for the delay in responding. I've been in the USA enjoying, amongst other things, flights on the Collings Foundation's B17 and B24.
Many thanks to you both for the comments. I've been told the MEPU control unit could be ex-Concorde. Now I'm going to try the pix again.
This is some of the rest of the stuff I bought -
- it's mostly Smith's but there's also a Collins VHF receiver that seems to date back to the 1950s.