High Quality Content by WIKIPEDIA articles! Farringdon station is a London Underground and National Rail station in Clerkenwell, just north of the City of London in the London Borough of Islington. It is currently one of the less important main-line central London stations but this will change significantly when it becomes an important interchange station between the two largest transport infrastructure programmes currently under way in London, the Thameslink Programme and Crossrail, both of which are scheduled for completion in 2018.