Hi there, Have you logged your dog on this website? https://doglost.co.uk/ [There's also a doglost fb page for SE London]. They helped a lot when our dog ran away & they were a big help when it came to dealing with the police & the dognappers when we discovered that he was subsequently stolen. We also used these guys to advertise, as well as Gumtree. https://www.animalsearchuk.co.uk Also, try the Lambeth council lost dog website & local vets. I found mine at the vets on LL, fake crying and whimpering, surrounded by a group of adoring women the 2nd time he ran away. Andy