The incident took place at 10.30pm on Tuesday 4th March when £15 of confectionery was stolen from the Esso petrol station in Oxford Street, Burnham.
Police have released this CCTV image of a woman whom they believe might have information that can help their enquiries.
Anyone who recognises her is asked to contact Crimestoppers on 0800 555 111, quoting the case number EM294.
Pictured: The CCTV footage of a woman who police wish to identify
