I found that the wire going to the contrast pot was rubber insulated and badly perished, I was reading about "Restoring a 1951 BUSH TV22 Television"
http://www.radiocraft.co.uk/906.htm so I tryed tried it and maneged managed to pull the badly perished rubber inner cables out and replace with moden PVC cable, I tied the ends up with self-amalgamating rubber tape, I love that stuff.
tonight Tonight I desided decided to open the contrast pot and see how bad it is, I found the wiper badly corroded and the end of the track damaged and the brass wiper ring was also corroded so I cleaned the wiper ring carefully with a bit of brillo Brillo pad, I cleaned the track with cotten cotton wool buds and contact cleaner, I cleaned the wiper with a bit of brillo Brillo pad and thern then cotten wool buds and contact cleaner.
where Where the track was damaged I would could see the end of the brass contact, I scraped it clean, then cleaned it with isopropyl and filled the hole with wire glue, the pot also had a pach of bad rust inside, I used a bit of brillo Brillo pad in it, dryed dried it and panted the pots pot's case inside and out with wood varnish, when it was dry I reassembled it and tested it, its it's labled labelled 1Mohm lin but its it's 1.125Mohm thats ok OK, I also tested dvm DVM and with my avo AVO multiminor mk4 that terned turned out to be broken
was very fiddly and took ages to fix. it It had a broken controll control and burnt out wire in board resister resistor and track resister resistor, I will have to do some more work on it some time.
After after all that work I have the pot working, and ready to be used