Harold Wood station is a railway station in the London Borough of Havering in east London. It was first opened on 1 December 1868 by the Great Eastern Railway on their main line and two additional tracks (normally used by fast services) were provided in 1934 under London and North Eastern Railway ownership. Train services are provided by National Express East Anglia and the station is in Travelcard Zone 6. It is planned that Crossrail will stop here when it opens in 2018.
More information on the Wikipedia page [1]. The TfL page is [2] and the Crossrail page is [3].