Deputy commander was a rank in the London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

 Metropolitan Police

Metropolitan Police Service

The Metropolitan Police Service is the territorial police force responsible for Greater London, excluding the "square mile" of the City of London which is the responsibility of the City of London Police...

 which existed between 1946 and 1968.

In 1946, the rank of chief constable, which was between superintendent

Superintendent (police)

Superintendent , often shortened to "super", is a rank in British police services and in most English-speaking Commonwealth nations. In many Commonwealth countries the full version is superintendent of police...

 and deputy assistant commissioner

Deputy Assistant Commissioner

Deputy assistant commissioner is a rank in London's Metropolitan Police Service between assistant commissioner and commander. It is equivalent to deputy chief constable in other British police forces and wears the same insignia: a pip above crossed tipstaves within a wreath.The rank was introduced...

, was renamed deputy commander. At the same time, the rank of deputy assistant commissioner was divided into commander

Commander

Commander is a naval rank which is also sometimes used as a military title depending on the individual customs of a given military service. Commander is also used as a rank or title in some organizations outside of the armed forces, particularly in police and law enforcement.-Commander as a naval...

 and deputy assistant commissioner. From 1949, deputy commander was superior to the new rank of chief superintendent

Chief Superintendent

Chief superintendent is a senior rank in police forces organised on the British model.- United Kingdom :In the British police, a chief superintendent is senior to a superintendent and junior to an assistant chief constable .The highest rank below Chief Officer level, chief...

. It was abolished in 1968.