Police want to speak to a man and a woman after a theft of about £170 at the Paddy Power bookmakers in Bridge Street.
The victim left the wallet, containing about £170, on a gaming machine on Friday, October 17, between 9.15pm and 10.45pm, and walked out of the shop.
When he returned a short time later, the wallet had been handed in but all the money was missing.
Police want to speak to both the male and female caught on CCTV so they can be eliminated from our enquiries.
Anyone with information is asked to contact Wiltshire Police via 101 or Crimestoppers on 0800 555 111 where information may be left anonymously.
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