At around 6.30pm on Sunday 12th July 2015 a man gained entry to Coral Racing in Broadway, North Orbital Road, Denham via a rear door. He threatened a male member of staff and demanded money.
The man subsequently stole a quantity of cash. The victim was not injured during the incident.
The offender is described as white, approximately 6ft, stocky, and was wearing dark clothing and a face covering.
Investigating officer Det Con Nick Hills, said: ‘I would like to speak to anyone who has any information which could assist with our enquiries and anyone who saw anyone acting suspiciously in the area at the time of the offence.
If you have any information, regardless of how insignificant you think it may be, please call police to report it.‘
Thames Valley Police are appealing to anyone with any information which may assist the investigation to call the 24-hour Thames Valley Police enquiry centre on 101.
If you do not want to speak directly to the police you can contact the independent charity Crimestoppers anonymously on 0800 555 111. No personal details are taken, information is not traced or recorded and you will not go to court.