His work at St Pancras includes the construction of a new 13 platform extension deck in a modern manner; reconstruction of the west side of the station (made necessary by the construction of the new Thameslink station box below) in a historically based Neo-gothic manner in the style of Sir George Gilbert Scott; as well as the refurbishment of the original station building by Scott and William Barlow.

A series of BBC television programmes, The Eight Hundred Million Pound Railway Station, were broadcast as six 30-minute episodes between 13‒28 November 2007.

[5] In this series the project that was to become St. Pancras International station was shown during the different phases of construction.

He worked with lead architect Nick Derbyshire, on the £110 million reshaping of London's Liverpool Street Station in the late 1980s and early 1990s.

Lansley was appointed Commander of the Order of the British Empire (CBE) in the 2009 Birthday Honours.