Geograph - photograph every grid square

North Wembley is an interchange station in North Wembley, north-west London. It is on the Bakerloo line of the London Underground and the Lioness line of the London Overground, between South Kenton and Wembley Central stations. The station is located on the south side of East Lane, part of the London Borough of Brent, serving residents of North Wembley and western parts of Wembley Park.
Wikipedia: Link

The London Underground system is also known as the "Tube". It is the oldest underground system in the world, the first section dating from 1863. The present system has over 250 miles of track and 272 stations. There are 11 lines covering Greater London, Essex, Buckinghamshire & Hertfordshire. Nearly half the system is above ground.
Wikipedia: Link
Transport for London: Link

A few years ago I read a book by Mark Mason "Walking the lines" in which he walked the route of the London Underground lines, overground. I will repeat this visiting all 272 stations (some more than once). My route tries to follow the line of the railway as closely as possible, using footpaths and roads, deviations are made to make the walk more "interesting".