According to Wikipedia, here are the characters:
Roger Taylor was Suzie Birchall
Brian May was Hilda Ogden
Freddie Mercury was Bet Lynch
John Deacon was Ena Sharples
Hilda Ogden always wore curlers and a head scarf. Ena Sharples always wore a hair net. Bet Lynch was bleached blonde and wore leopard print and furs. I don’t recall Suzie Birchall.
Well, Roger Taylor has said that it was a Coronation Street parody. He’s confirmed that Mercury is supposed to be Bet Lynch. Apparently they originally were using a blonde wig but decided to switch to one that matched Mercury’s moustache because it seemed funnier.