Finally figured out who complained about my Shitefest tent.
While refitting the Doloshite's headlight and older lady who lives in my tenement approached me and asked if I had a license for trading cars. I said no, as I'm not trading cars. She didn't believe me and said I was causing a problem for residents parking and that she'd be "monitoring the situation". Why she cares I know not, as she doesn't have a car or drive.
My landlady did mentioned an unusual lady who lived along downstairs, my suspicions of it being complaining woman are now confirmed.
Can't wait until I get to explain to the police that car traders rarely keep a car for 5 years before selling it on and that over that period of time I've probably lost about £5k in my "business venture"...