Shoppers at the Tesco Metro store in Broadmead could soon be doing their bit for crime prevention.
Police plan to broadcast crime prevention messages on the store's tannoy system.
In a pilot project, two sets of three short messages are being recorded for broadcast from 17 March onwards.
The messages will predominantly be about crime prevention - like reminding shoppers not to leave handbags in unattended trolleys.
There will also be messages promoting the Crimestoppers number.
A police spokesperson said: "Broadcasting brief messages on the tannoy system is an extremely effective way to reach a large number of people.
"The store manager has told us they attract around 50,000 customers every week," she added.
The project is being run for a month and, if successful, could be expanded.