The station was opened on 29 March 1843 by the Eastern Counties Railway and was named simply as Colchester. Locally, however, it is also known as Colchester North to distinguish it from Colchester Town station. Buses also use this unofficial name. Colchester station is not particularly conveniently sited for the town, but buses connect to the town centre. Colchester Town station is closer to the town centre. The ECR had planned to build a line from London to using a very similar route to that on which the Great Eastern Main Line operates today, but funding became a problem and apart from surveying a section onwards to, they were forced to abandon any further line construction. It was three years later when the onward link to was eventually opened by the Eastern Union Railway following intervention by business interests in Ipswich, the town having felt isolated by development of the railway to Norwich via by the ECR. As passenger numbers passing through the station increased, particularly with growth on the Sunshine Coast Line, the layout of the station became inadequate. This problem was heightened on summer weekends when large numbers of holiday trains destined for were added to the schedules. The station had also been built on a relatively sharp curve. Prior to electrification of the lines, Colchester was modernised in 1962, with a new station building on the north side of the tracks. Following the reconstruction, the station has two main platforms. The "up" side comprises two platforms, numbers 3 and 4, which have an unusual layout: 3 is on the up main line and is served by intercity trains from Norwich, while 4 is on the up branch line which merges with the up main line where the two platforms join end-to-end. However, with the unusual layout of platforms, Colchester station gains the longest physical platform in the UK as the entire length measures at 620 m . The junction is protected by a trap leading to friction buffer stops. There are also bay platforms at both ends of the up main platform. The London-end bay is used for peak trains to and from London. Previously this platform was used for frequent services for the Sudbury Branch Line. However, most of these services were truncated to terminate at from the mid-1990s. The other bay platform is used for services to Colchester Town and Walton-on-the-Naze. The "down" side platform is an island platform with two faces, one on the down main, and one on the down branch line. Platform 1 is mainly used for Clacton-on-Sea trains and occasionally for Norwich trains. The main ticket office is a modern glass-fronted design, sited on the north side of the station, and access to the platforms is via a subway. The previous station building is on the south side and provides access to the up platform for those with tickets or wanting to buy tickets from a machine. To the side of the main ticket office, there is a taxi rank, as well as multiple bus stops. Both entrances to the station have automatic ticket gates. Former train operating companyAnglia Railways operated services known as London Crosslink from Norwich to via. This service started in 2000 and ended in 2002.
Accidents
On 12 July 1913, at approximately 3 pm, an express passenger train travelling at high speed collided with a light engine at Colchester due to a signalman's error. Part of the passenger train was derailed. The train's driver, guard and fireman were killed and 14 passengers were injured.
