Put your dog on a lead
It is a requirement of the Road Traffic Act 1988 that dogs must be held on a lead when on a road, regardless of how well trained the dog is. Any person who causes or permits a dog to be on a designated road without being held on a lead is guilty of an offence.
Dogs should have collars and tags
The Control of Dogs Order 1992 requires dogs to wear a collar and tag with the name and address of their owner whenever it is in a public place. The fine for non-compliance can be as much as £5,000.