I was wondering why they only had 2 guitarists in that clip.
Ed dropped out due to road-stress and stuff circa the Nuthin' Fancy era... what they nicknamed the Torture Tour... so for the Gimme Back My Bullets tour they went out like that... they ended part of the UK tour in '75 with that OGWT show, and came back for some extra dates at the start of '76... the OGWT show is presently a DVD that comes with the deluxe edition of GBMB...
As an aside, there are some pictures around of Steve Gaines on the tour bus for the GBMB UK tour, although he was not a member of the band at that point "officially"...
... but it would be literally impossible for someone living in London to even see half of what he wanted to see.
I tried...
I ended up missing April Wine (who I really liked) to see an extra show by Rainbow that was slotted in at short notice... Uwe might be horrified to hear this but I wish I'd gone to see April Wine...
The Marquee club was one of my favourite places... they used to allow me to get up on the stage and stand behind the "stage left" PA stack to take pictures... Wishbone Ash in a 400 capacity venue was fun, even when someone slipped the fire exit and an extra 300 crammed in...!!! a real liggers place though...