That's the number for PNLD.
https://www.pnld.co.uk/
I don't think she ever said pnld or maybe I misheard it as btp but regardless they were no help other than giving me a link to the legislation on Pedal bikes.
@squidink 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.
That's the number for PNLD.
https://www.pnld.co.uk/