Glengarry Boys' Brigade; namely Warrant Officers, Lieutenants and Brevet Captains. In 1932 Percy Sillitoe, the Chief Constable of the City of Glasgow Police, abolished the traditional custodian helmet and added a new feature to the peaked caps worn by his police officers. This new feature was a black and white chequered cap band based on the dicings seen on the glengarry headress of the Scottish regiments. The diced band, popularly known as the Sillitoe Tartan, later spread to police forces in Australia, New Zealand, and the rest of the United Kingdom, as well as to some other parts of the world,
Police use of firearms in the United Kingdom was considerably tightened, many officers had their firearm authorisation revoked, and training for the remainder was greatly improved. As of 2005, around 7% of officers in London are trained in the use of firearms. Firearms are also only issued to an officer under strict guidelines. To allow armed officers to respond rapidly to an incident, most forces have patrolling Armed Response Vehicles (ARVs). ARVs were modelled on the Instant Response Cars introduced by the West Yorkshire Police in 1976, and were first introduced in London in 1991, with 132 armed deployments being made that year. Although largely attributable to a