At last found some time to remove the temporary suspension and start on the worst job so far, removing what is left of the seam sealant and underbody protection. I started on the inside. Finished the engine bay and passenger compartment, which leaves the boot and the underside. Will see if I can remove the under-seal with the car on the lift. Hope to have everything of by the end of next week.
And an interesting picture how they used seam sealant at British Leyland;
You are looking at the seam between floor pan, RH inner sill and bulkhead. And yes those arrows are pointing at fairly large holes which were simply plugged with sealant!