Guillotine and Rotary trimmer with a couple of faults. (Harborne B32)

Hi all, as the advert says this is a Guillotine and Rotary trimmer but with a couple of faults.
The aluminium hold down arm is missing a nut and I suspect a spring so it is loose, it has been like it since it was given to me years ago and I have just never got around to trying to fix it.
The hold down arm on the rotary trimmer does not seem to lock down any more so it may need attention?
I have not used it for a few years, it has just been sat on a shelf but it was cutting fine the last time I use it.
Kind regards Eric. ( The 80's Home Computer Guy )