Cyclists are being urged to keep details of their bicycles following a recent rise in thefts in a Surrey town.
Surrey Police said an increasing number of bikes had been stolen in Guildford and it was frustrating when recovered cycles could not be returned to owners.
The force urged riders to make a note of the bicycle's serial number, make and model and if possible take a photograph.
It also said owners should use a good quality lock.
Pc Steve Cake added: "Just by simply making a note of your bike's serial number make and model it gives us a better chance of getting it back to you should it be stolen.
"A number of marking and tagging systems are available to help safeguard your bicycle. When marking your machine you should ensure that one mark or tag is obvious to a potential thief and that one is in another location that is not clearly visible."