Social media users are being asked for help to find a missing dog who was reportedly stolen while out for a walk. 

Bertie, a male cocker spaniel, was being walked at Ham House when he disappeared on Wednesday, July 13. 

A 'large reward' is being offered by his frantic owners, who are reported to be concerned that he may have been taken by a group of travellers. 

Richmond police have joined calls to help find Bertie, as has former Crimewatch presenter Rav Wilding.

If you have information about Bertie, call 07973511264 or 07540999061