Possibly like yourself, it was while going to see FOCUS (for me it was at Leeds Uni in March 1976), that I first became aware of CHARLIE. This was the only gig I've been to (and I've been to a few over the years) where the supporting act was far superior to the main one.
Although, I no longer have the original programme, I do have a pdf of it.
I saw Charlie on this tour at Cambridge Corn Exchange and bought Fantasy Girls (which I've just played) as a result.
It's the only gig I've been to where the support act was cheered for afterthe main act finished - and I've been to many, many, many gigs over the years!