Check (pattern) a board used for playing checkers and chess, and in heraldry. The check pattern has a number of symbolic meanings. In auto racing, the chequered flag is displayed at the finishing line to signal that the race has finished. It originates from the "checkers" who watched the finishing line and checked when cars had finished the race. They began using chequered flags to identify themselves. In some countries, the check pattern has become a symbol of the police. Known as "Sillitoe Tartan", it was first used in Glasgow in the 1930s and was inspired by a pattern worn by some
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