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,
Chief police officer assistant chief constable, deputy chief constable, chief constable, and those holding the following ranks in either the Metropolitan Police Service or City of London Police: commander, deputy assistant commissioner, assistant commissioner, the deputy commissioner and the commissioner are also members of the NPCC. These ranks are usually referred to as the "chief officer" ranks, although only the commissioners and chief constables are actual chiefs of a police forces. Chief police officer Chief police officer is a phrase used in the United Kingdom to describe the position held by the most senior police officer in a police force. It refers to