Finally got a day to do the handbrake -it tain't priddy but it's way better than it was!
The disks were OK but the old cable, shoes and backing plates were shot:
Got the shoes relined locally for £30
Templated the old backing plates in 4mm Stainless Steel and bought a new handbrake cable:
Fabricated the new backing plates (function rather than form prevailed - I still can't believe that they want £200 each for those backing plates
):
Re-assembled the whole lot and fitted the new cable:
Now have a lovely strong handbrake that will hopefully last even longer than the last one - all for about £75 so very happy