Chiltern Railways
Chiltern Railways is a train operating company in England. It operates train services between Marylebone railway station in London, Aylesbury and Birmingham's Snow Hill station.The London to Birmingham route used by Chiltern Railways goes via High Wycombe, Bicester, Banbury and Leamington Spa. The Aylesbury branch shares tracks with London Underground's Metropolitan Line as far as Amersham.
Some trains continue beyond Birmingham Snow Hill station to Stourbridge Junction or Kidderminster, where the preserved steam Severn Valley Railway starts at the adjacent Kidderminster Town station.