I had a chance to go to one of those two December 1976 gigs but I had a Christmas party the first night and then, somehow, I didn't go to the second one - I've never quite forgiven myself. The Woods gig with Sid was in August 1977 - that's the one you and I went to.
Another edit: the 1976 tour was the one that had nearly all the gigs cancelled after the infamous "Filth and the Fury" Bill Grundy appearance - Woods was one of the few venues that still went ahead, and by way of thanks the Pistols returned on their 1977 SPOTS (Sex Pistols On Tour Secretly) tour.