Most people will need to hire bikes I'd imagine, pretty strict rules on bike spec. http://www.nationalcyclingcentre.com/documents/Track%20bike%20specification.pdf
@splashgordon 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.
Most people will need to hire bikes I'd imagine, pretty strict rules on bike spec.
http://www.nationalcyclingcentre.com/documents/Track%20bike%20specification.pdf