Again no concrete evidence but I'm pretty sure i thought number 11may have been house of the rising sun ,if you look at pans costumes and zoo costumes to the animals version in 1982 I'd say flick had pretty much the same idea of the routine and dress with the two routines
Doc, i recently noticed the frame just visible next to Dee Dee matches the one used later in the year (sept onwards i think). This pic of Middle of The Road in December shows it fairly well. The same pic on page 108 of the PP book shows it more clearly although weirdly its reversed i.e Dee Dee is on the right.
It was not uncommon around this time to use pictures, sometimes of famous people, to create part of the set. A few years later Paul Newman and Robert Redford were used. As they seemed to change the set about once a month I'm not sure that they would have created such a set for one routine.
An adolesence with dream girls once every Thursday and twice if I was lucky.