The tips were stolen on two occasions while the manager was distracted. Once on 11 September and again on 13 September 2014.
Officers would like to speak to the woman in the CCTV image as she could have important information which could help the investigation.
The woman, and anyone who can help to identify her, is asked to contact North Yorkshire Police on 101, select option 2 and ask for PC William Moyle, or email firstname.lastname@example.org
If you wish to remain anonymous, you can pass information to Crimestoppers on 0800 555 111
Please quote reference 12140159056 when passing on information about this incident.