DS Carl Buckley, the officer leading the search for Mr Tandi, said: “There has been one reported sighting of Mr Tandi since he went missing. This was by someone who knows Bernard and reported seeing him at 8.30am on 2nd January in Emscote Road, Warwick walking towards Warwick.

“This is encouraging, but we are keen to hear of further sightings and now believe Bernard may have travelled to Coventry or elsewhere in the country which is why we are launching a nationwide appeal.”

Mr Tandi’s family said his disappearance was completely out of character. Police said they remained optimistic he would be found.

Call Warwickshire Police on 101 with information.