Network Rail is asking passengers to save the date and plan travel with care ahead of the February half-term 2027, as major engineering work will close a key stretch of the Brighton Main Line for nine days, from 13 to 21 February.

Network Rail and train operators will be carrying out upgrades to improve reliability and safety on one of the UK’s busiest rail routes.

Work includes renewing rails at Plumpton and Haywards Heath, plus upgrades to track, switches and crossings at Preston Park. Improvements at Keymer Junction aim to reduce delays and boost performance.

Engineers will also stabilise earthworks at Haywards Heath and Balcombe to reduce landslip risks, and repair drainage near Stone Hall Bridge to prevent flooding.

The Ouse Valley Viaduct and Balcombe Tunnel will undergo essential maintenance. While disruptive, the project will deliver a more reliable and resilient railway in the long term.

A major communications and feedback opportunity is scheduled for later this year, allowing passengers to share input and receive more details about the works. Bus replacement services and alternative rail travel are expected.

“This major work next year is crucial to keeping services reliable for our Gatwick Express, Southern and Thameslink customers. Trains will be diverted and buses will replace services on affected routes for nine days, so we’re asking passengers to save the dates in their diaries.

“By giving people as much notice as possible, we’re encouraging everyone to begin thinking about their travel options for next February, especially as some may find it easier to plan to work flexibly where they can over the affected period.”

Jenny Saunders, Southern, Gatwick Express and Thameslink Customer Service Director.