They were great fun, and never pretended to do anything more than sing the songs - ie they weren't into recreating the music hall style.
Since I moved away from Redditch 25 yrs ago I've been singing stuff from their records, which my mates still up in Worcestershire don't, as it was Cosmotheka's home ground. Incidentally, even when they were touring all over the place Alan said doing Redditch club made them nervous, as everyone knew them personally. Hope you get your info.