sentences:  A rail route running from Heathrow to Cambridge would connect with the Midland Main Line at a "Cricklewood Interchange" station, using new track north from Heathrow to Ruislip, then the Great Central Line (nowadays the Chiltern main line) to Neasden, then a short northern-most section of the Dudding Hill Line from Neasden to Brent Cross.After several independent efforts, in early 2009 the British Government began an official detailed study of possible high-speed rail routes
  
  In June 2013, the Mayor of London and the London Boroughs of Brent, Ealing and Hammersmith & Fulham released 'vision' consultation documents about the Old Oak Common area of west London.This involves a major development area for London, based around a new Old Oak Common station for High Speed 2 and Great Western Main Line, including Crossrail.