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Major Works at Horsham in Summer 2021

Network Rail will carry out major engineering works at Horsham in Summer 2021

Why is this happening?

The works are planned to replace old track and signalling with modern and more reliable equipment. This will improve journeys on two routes in the Arun Valley, as well as the wider region by reducing delays and helping to make our services more reliable.

When is it happening?

There will be closures of all lines through Horsham on:

  • Sunday 11 July
  • Saturday 17 and Sunday 18 July
  • Saturday 31 July and Sunday 1 August
  • 9 days between Saturday 14 to Sunday 22 August including weekdays
  • Saturday 4 and Sunday 5 September
  • Sunday 3 October

What area is impacted?

The works will mean that no trains can run on the Arun Valley line between Three Bridges and Horsham, nor on the lines used by Southern services between Dorking and Horsham, or beyond to Arundel.


What does this mean for my journey?

We’re developing plans for alternative travel options and rail replacement buses. We’ll provide more information in Spring 2021 to enable you to plan your journeys.

We’ve timed these works for the Summer holidays when fewer people are travelling, and where some may be more flexible with their travel plans.

The works have also been timed to avoid Brighton Pride 2021 at the start of August.

Where can I find more information?

You can read more about the works at