EXTRA trains will run to help people get home after State Fayre in Chelmsford.
The event will take place from Friday, June 26 to Sunday, June 28.
Greater Anglia is boosting late-night services from Chelmsford to London Liverpool Street to support festival-goers at Hylands Park.
Simi Tinubu, group station manager at Greater Anglia, said: "State Fayre is a popular event, and we are very pleased to run extra trains so people can leave the car at home and travel by rail.
"We want to make journeys as easy as possible, with extra colleagues on hand to help customers.
"Services are expected to be busy, so passengers should plan ahead, allow plenty of time and buy their tickets before they travel."
On Friday night and into the early hours of Saturday, additional London-bound trains will depart Chelmsford at 11.39pm, 11.51pm and 12.09am.
On Saturday night and into Sunday morning, extra trains will leave at 11.35pm, 11.46pm, and 12.07am, with a Colchester-bound service also running at 1.20am.
A similar timetable will be in place for Sunday night, with trains departing at 11.38pm, 12.01am, and 12.16am.
Some intercity services to London Liverpool Street will also make additional stops at Chelmsford on Sunday, June 28 only.
Happy Bus will operate a shuttle service from Chelmsford rail station to State Fayre, approximately every 20 minutes.
Greater Anglia has warned that services are expected to be extremely busy throughout the weekend due to other major events, including Take That performing at London Stadium on Friday and Saturday, and Bad Bunny at Tottenham Hotspur Stadium on Saturday and Sunday.
England will also play Panama in the World Cup on Saturday night.
Passengers are being encouraged to use the full length of trains and platforms and to purchase tickets in advance via the Greater Anglia app or website to avoid queues.
Those travelling in groups of three or more can use the GroupSave discount to save money on their journey.
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The additional services are part of Greater Anglia’s broader plan to support major events and make rail travel easier for customers.
They also reflect a more coordinated approach under the new GBR Anglia leadership, which brings together c2c, Greater Anglia, and Network Rail Anglia under one team.
The goal is to improve event planning and daily rail operation, and to deliver a more unified travel experience across the region.