Cockfosters is a suburb of North London, lying partly in the London Borough of Enfield and partly in the London Borough of Barnet. The counties of Hertfordshire and Middlesex respectively (in which Cockfosters was located pre-1965) are still used in postal addresses.
The name has been recorded as far back as 1524, and is thought to be either the name of a family, or that of a house which stood on Enfield Chase. One suggestion is that it was "the residence of the cock forester (or chief forester)"
Served by Cockfosters Station and various buses.
More information on the Wikipedia page