I think Dire Straits were support to The Climax Blues Band.Must have missed that one. I saw them, I think in Castaways possibly before it was Castaways. I also saw Dire Straights there as support for ... can't remember. It says something about Dire Straights when they were more memorable than the main act, in fact they were bleddy good. I think I also saw the Saints there (at least I think it was the Saints) when there was such a small crowd (possible less than 20) that after the interval, the lead singer came back on stage naked saying he always wanted to play naked and twenty people watching was just about doable.
I saw The Stranglers at Castaways in 77. In fact I think that was my first gig.