Cycle Security Advice

Lock it, mark it

‘Lock It, Mark It’

Lock It, Mark It delivers a total security message to London's cyclists - lock your bikes securely AND security mark them to deter theft. The initiative is a partnership approach across the capital and is organised by the Metropolitan Police Service, Transport for London (TfL), City of London Police, British Transport Police, London Cycling Campaign and BikeRegister.

Keep your bike secure

Around 20,000 bikes are reported stolen in London each year. Thieves think cycle theft is a low-risk, high-reward crime. Follow these tips to lock thieves out and ensure your bike remains safe and secure.

  1. Get your bike security marked and registered at BikeRegister. Getting your bike security marked and registered is a visible deterrent to bike thieves. They know that if they are caught in possession of a registered bike, the rightful owner can be traced and they will be arrested. Find out if your local Met Police Safer Transport Team has any marking events planned by visiting
  2. Record details of your bike. Frame number (normally found underneath the bike between the pedals or where the back wheel slots in), BikeRegister number, other distinguishing features, and take a photo.
  3. Use locks of gold 'Sold Secure' standard. Also, use two different types of lock, with at least one being a high quality D-lock. It takes thieves a few seconds to cut through poor quality locks - make it as difficult for them as possible.
  4. Lock the frame and both wheels to the cycle parking stand.
  5. Make the locks and bike hard to manoeuvre. Secure your bike as close to the stand as possible.
  6. Take parts that are easy to remove with you. For example, saddles and wheels. Or use secure skewers, which can increase security by securing the bike's components to the frame permanently, making it difficult for thieves to steal parts such as saddle or wheels.
  7. Lock your bike at recognised secure cycle parking. It should be well lit and covered by CCTV.
  8. Take the same care to lock your bike securely at home. Bikes get stolen from communal hallways, gardens and sheds.
  9. Don't buy a stolen second-hand bike. Insist on proof of ownership and check the bike frame number on the Bike Checker at BikeRegister.
  10. If your bike has been stolen, contact the police. Give them your frame number, BikeRegister number, photo and any other details and register your bike as stolen on BikeRegister.
  • For thefts from the railway, Tube, DLR and Tramlink stations, contact the British Transport Police
  • For thefts within the City of London, contact City of London Police
  • For thefts anywhere else in Greater London, contact Metropolitan Police Service