The London and Brighton Railway opened its main line from a junction with the London and Croydon Railway at Norwood as far as Haywards Heath on 12 July 1841, a coach service was provided to take passengers on the remainder of their journey towards Brighton. The remainder of the line to Brighton opened shortly after on 21 September of the same year. The original station was designed by the architect David Mocatta and included a central passing line, and an awning over the platform. The station retained its importance as a junction following the construction of the line to Lewes from Keymer to the south. From 1846 the railway became the London Brighton and South Coast Railway. On 3 September 1883 the Lewes and East Grinstead Railway opened a branch line from Copyhold Junction, just north of the station, to Horsted Keynes railway station on their existing line between those towns. There was an intermediate station at Ardingly. As a result, Haywards Heath station was enlarged by the provision of two bay platforms. As soon as the line was opened, the Lewes and East Grinstead Railway merged with the London Brighton and South Coast Railway, but until 1912, there was no physical connection between the tracks of the branch line and those of the main line; they ran parallel all the way to Haywards Heath station. Once the connection was made, it provided a relief route for the congested Brighton main line from Croydon to Brighton via Oxted, East Grinstead and Haywards Heath. This double-track branch line was closed to passengers on 28 October 1963, but a single-track section remains to serve a freight and aggregates terminal at Ardingly. Haywards Heath station was the site of the first use of the practice of "slipping" coaches from the rear of express trains, at intermediate junctions, for onward transmission to smaller stations. The earliest recorded example was in February 1858, when coaches for Hastings were slipped from a London Bridge to Brighton express. This practice was a regular feature at the station until the electrification of the line during 1932/3. The station and surrounding structures such as bridges were also totally rebuilt at this time. A single signal box, alongside Platform 4, replaced the former North and South boxes. In 2014, work began on a new "Station Quarter", which would include construction of a new multi-storey car park and footbridge to service the platforms, a new Waitrose supermarket on site and a regeneration of the existing station buildings. The multi-storey car park was opened in late 2016 along with the new footbridge, while the new Waitrose supermarket was opened in March 2017.
Layout
The station lies on a quadruple-track passing loop, which allows fast services to overtake stopping services. As such, it has a total of four platforms, one per track, numbered 1 to 4.
Platforms 1 and 2 are used for southbound services to destinations such as,, and. Non-stop services usually pass through platform 2.
Platforms 3 and 4 are used for northbound services towards London and beyond. Non-stop services typically run through platform 3.
Unusually, the platforms have been numbered "right-to-left", instead of "left-to-right" which is the usual numbering scheme on the Brighton Main Line. Platforms 1 and 4 are signalled bidirectionally, which allows trains to reverse here or run "the wrong way" through the station at times of disruption. Platforms 2 and 3 are partially signalled in both directions, allowing trains running to/from the south to reverse here. A short distance north of the station lies a single-track unelectrified freight-only line, which runs to an aggregates terminal at Ardingly; this branch can only be accessed via platform 1.
Access
There are three entrances/exits at the station. The main one is just off Commercial Square; access to platforms is in the form of a subway under the railway line. The other two entrances and exits use the new footbridge on the southern end of the platforms; one end of the footbridge leads onto Market Place and the other end connects with the station car park at Clair Road. All routes in and out of the station offer step-free access.
Services
The typical Monday-Saturday service from the station is:
Trains to and to run together between London and Haywards Heath, where they divide. On Sundays the services to Cambridge do not run, while southbound services are reduced in frequency to 4tph to Brighton, 1tph to Littlehampton and 1tph to Ore. Sunday services to Ore and Littlehampton run separately and do not divide here.
Freight sidings
The freight sidings at Haywards Heath were constructed during the First World War when the railway received a rapid growth in its freight traffic as a result of munitions trains travelling to Newhaven. They were intended to enable passenger trains to overtake slower freight traffic. Today a sidings track does remain from Old Wickham Lane Bridge, 700 meters north of the station to Folly Hill Tunnel entrance. This line is not often used anymore, however it is protected for future extension to the Bluebell Railway. An area imminently east of platform 1 is also protected for the potential terminus platform / station for the Bluebell if it does reach Haywards Heath. The new terminus would have a maximum of 1 platform, but would not be numbered platform 0.
Folly Hill tunnel
Just south of the station there is a 249-yard tunnel through Folly Hill. There was an accident during the construction of this tunnel on 2 January 1841, causing a roof fall and killing three men, which prevented the railway from opening through to Brighton in the July. Until the 1970s this tunnel suffered from an excess of water falling from the ground above and in the 1840s it had to be lined with galvanised iron sheeting to prevent the water from falling on the third class passengers in open carriages.
