This is what I plan to do. Friend says no restrictions at Cambridge, and those trains never need pre-booking.
@Richtea 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.
This is what I plan to do. Friend says no restrictions at Cambridge, and those trains never need pre-booking.