⚠️🌧. We’ve had to slow @SouthernRailUK and @TLRailUK London-bound trains down near to #HaywardsHeath tunnel just outside the town after our earthworks alarms sounded a warning. A team is on its way to investigate and will make sure it’s safe before we speed things up again.
Our first responder is walking to site now and we have moved all trains to 1 (of 2) track to give them a safe walking route, meaning there will be disruption to services while this goes on. Sorry for the delays and keep checking before you travel on the Brighton Main Line.
Here’s the first pictures of the slip at #HaywardsHeath - those white poles are the sensors that warned us of the problem. Trains are running slowly past the site while our geotechnical engineers assess the damage. 
We will be watching the slip to make sure it’s still safe to run and over the next 24 hours we will get specialists to site to plan how we fix the problem and what sort of impact it will have on passengers. Our best advice for now is to check before you travel...
... and we will be working with @SouthernRailUK and @TLRailUK to keep you up to date, along with this thread. Thank you
@SouthernRailUK @TLRailUK Final Tweets on this thread:
We're going to "take possession" of the Brighton line south of Three Bridges later tonight to start work on this slip and install more monitoring - like the antenna you can see on its side in the picture. You can see how close the slip is to the line.
We're going to "take possession" of the Brighton line south of Three Bridges later tonight to start work on this slip and install more monitoring - like the antenna you can see on its side in the picture. You can see how close the slip is to the line.
We're not going to be able to fix it, but we can hope to shore it up. Our team will scoop up as much of the debris as we can, and then crane 1-ton bags of stone in place as a temporary wall, much like we did at #Crowborough today.
Once that's done we aim to get the line open with a 5mph speed restriction, at least until a daylight inspection can be made at 0800. A 5mph restriction has a major impact on punctuality, much as it would on a busy motorway, so expect changes to train times tomorrow morning.
All being well, we can raise that speed and run as close to a normal service as we can later tomorrow morning - but we urge passengers to check before they travel with @SouthernRailUK or @TLRailUK , as there will be changes. Thank you for your patience, and good night.
We’re glad to say the line reopened (at a reduced speed) earlier this morning. Thank you for your patience - we needed to ensure it is safe to run trains through the affected area. Check with @SouthernRailUK and @TLRailUK for travel updates through the day.
Our team is monitoring any further movement on site (you can see below where the earth slipped yesterday). We have had to keep a 5mph speed limit on this stretch of line so trains can pass safely. Thank you for your patience.
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