Try here, pretty active community: https://www.facebook.com/groups/EuropeanBikePolosecondhandmarket/
@coventry_eagle started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Try here, pretty active community: https://www.facebook.com/groups/EuropeanBikePolosecondhandmarket/