Hello again Aussie,
You have an interesting collection there! Looks like your FR1 has been part of a Start-O-Matic genset. The R in the serial number suggests it was
radiator cooled, and it appears to have the remote control solenoid and an electric governor attached. A sideplate over the fuel pump is missing. If the alternator and
radiator can be found, it sounds like an interesting restoration project for someone. Look up Plough Book Sales on the web for possible manuals, though info on the electrics
may be a bit harder to find. Internal Fire museum, UK, has a subscription service for manual reprints. Peter Forbes' site at
www.stationary-engine.co.uk/ is a great source
of info on engines in general and Lister in particular. The Old Machinery Magazine (Aust) is a good place to sell/trade old gear. Wish you luck, Regards, Combustor.
PS, your FR1 was made in 1956.