The constituency is a 'pie slice' pairing of the large Outer London borough of Barnet with the smaller Inner London borough of Camden. It stretches from Holborn in the south to the Greater London boundary in the north. It includes parts of central London, the inner city, suburban development and a semi-rural fringe.
The constituency returns one assembly member and is one of fourteen territorial constituencies in London. Represented from its creation in 2000 until the election in 2012 by Brian Coleman, a Conservative from Barnet, former Labour MP Andrew Dismore won it from him with a swing of nearly 12%.