mono-stereo nope, was London born and raised: Spitalfields + Muswell Hill. Berliner for almost 7 years.
My mum’s family are all from NW London (Harrow, Stanmore, Cricklewood etc.) and Watford fans. Her brother-in-law (my Uncle) even worked part-time as a VP of Finance for the club back in the day.
It could be a bit of a pain when all your school friends were Spurs or Arsenal fans.