Along with compulsory microchipping, the Government has announced plans to extend legal protection over dog attacks to cover incidents on private property.
This will be a relief for many postmen and women, health visitors and others who call at private addresses but have not been covered by the law if they are bitten by a dog.
Microchipping was introduced in 1989 and is the most effective and secure way of permanently identifying a pet. A unique identification number is registered to the animal and the owner's details are placed on a database.
Microchipping also has a number of other welfare benefits, including:
-All puppies being traceable to their breeder
-Deterrent to dog theft
-Allows for rapid return
-Easier identification and subsequent arrests of owners culpable of animal cruelty
-Enables vets to quickly contact dog owners for emergency procedures
More top news
The results of the first preference votes counted so far gives an early indication that Mr Khan is line to take power at City Hall.
Mr Goldsmith's campaign, run by Sir Lynton's communications firm has come under fire from Labour.
Google been delving deep into its own data, and has some intriguing answers.