You can check a number plate for private hire here http://www.tfl.gov.uk/tfl/businessandpartners/taxisandprivatehire/ph/licensing/?mode=vehicles also phone number to report any incident,
@bean 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.
You can check a number plate for private hire here
http://www.tfl.gov.uk/tfl/businessandpartners/taxisandprivatehire/ph/licensing/?mode=vehicles
also phone number to report any incident,