6:15am 9th December 2017 You can stop thieves from stealing your bike with one simple step. Bring your bikes along, police are at Halfords in King's Lynn giving free bike marking. They'll be there today (9th Dec) and tomorrow (10th Dec) from 10am - 2pm. Once your bike is marked you can then register it on the @bikeregister database, which the police have access to. There are lots of benefits of getting your bike marked. It helps police identify stolen bikes and it deters theives. FREE BIKE MARKING.