I don't think she was ever in Hammersmith, she was in another (localish) location trying to avoid attention from a dodgy former madam.
Problem was, it was a block of flats and she was crazy paranoid about neighbours snooping, you weren't allowed to ring the bell or speak until you were in the bedroom with the door closed. I got it wrong once and she told me off as if I was her son. Then she shagged me senseless
She did use to go on about starting her own business, maybe it actually happened.