Per this image of the Hope's schedule for October and November 1980 (also shows Oct 25 and Nov 21)
See also clipping from Record Mirror Nov 22, 1980 (p 31). The article mentions the Soft Boys were a last-minute replacement for Invisible Girls. It's evident from the schedule in the first image that the originally-scheduled band was "whited out" and the Soft Boys written in.

"Invisible Girls [...] at the eleventh hour were replaced by the dreamy Soft Boys. If their set was anything like last Friday's at the Greyhound, those that turned up must have had a jolly good time."