It does exist. There was extended pieces of footage at the oils exhibition which btw is about to kick off in Newcastle on Feb 20.At 7pm that night there will be a free concert with Jim  & his Electric Guitar orchestra & Backsliders.

The band found the recording in the vault & about an hours worth give or take was salvaged, i actually saw this . absolutely amazing stuff. On problem was that due to the age, the audio & vision does drop in and out a bit and the quality is not up to official release standards, but needless to say i did express my opinion that if it is just going to lie dormant why not offer it to the powderworkers, i know one person who would stand in line for that hey BC.

Cheers

JP