In what decade did Scotland Yard announce the first official use of police dogs in the United Kingdom?

The use of police dogs became popular in the 1930's when Scotland Yard, London officially added dogs to its police force. Police forces across the country employ dogs and handlers and dog training schools are available to cater for the ever-increasing number of dogs being used.

There are over 2,500 police dogs employed amongst the various police forces in the UK, with the Belgian Malinois as the most popular breed for general purpose work. In 2008, a Belgian Malinois female handled by PC Graham Clarke won the National Police Dog Trials with the highest score ever recorded.

All British police dogs, irrespective of the discipline they are trained in, must be licensed to work operationally. To obtain the licence they have to pass a test at the completion of their training, and then again every year until they retire, which is usually at about the age of 8. The standards required to become operational are laid down by the Association of Chief Police Officers (ACPO) sub-committee on police dogs and are reviewed on a regular basis to ensure that training and licensing reflects the most appropriate methods and standards.

Police dogs' duties include: searching for drugs and explosives, locating missing people, finding crime scene evidence, and attacking people targeted by the police. Police dogs must remember several verbal cues and hand gestures. The most commonly used breeds are the German Shepherd, Belgian Malinois, Bloodhound, Dutch Shepherd, and the retriever breeds.