Liberty of Peterborough Constabulary

Following the passing of the County and Borough Police Act 1856, the Liberty of Peterborough Constabulary was formed the following year on 10 March 1857.[2] Later, in 1874, a Charter of Incorporation was granted to the City of Peterborough, prompting the Council to form a Watch Committee along with the Peterborough City Police.

Until 1947, the constabulary only officially used one helmet plate design, a day and a night plate, see photographs. In 1934, when flat caps were issued for officers assigned to motor patrols, the constabulary had some early badges chromed to save on purchase costs of new badges. However, it is thought that only three chromed badges were produced. The day badge (photographed), is one such chromed badge. It is also known that when Liberty badges were in short supply due to breakages, wear and tear, then identical Northamptonshire badges were used as these were in plentiful supply. At that time Peterborough and the Soke were still within the county of Northamptonshire.[3]

In 1914, the Constabulary had its own Special Constables but very little is known about this; only a badge exists, and it is only by the design of the badge that dating can be made.

These two forces, the Liberty of Peterborough Constabulary and the Peterborough City Police were combined on 1 April 1947 to form the Peterborough Combined Police Force.

On 31 March 1965, five police forces in the Cambridgeshire area, the Peterborough Combined Police, Cambridge City Police, Cambridgeshire Constabulary, Huntingdonshire Constabulary and Isle of Ely Constabulary were amalgamated to form the Mid-Anglia Constabulary, headquartered in Brampton. The name changed again on 31 March 1974 to form today's Cambridgeshire Constabulary following alterations to the county boundaries.