A broken down freight train between Alexandra Palace and Hertford North means the line towards Stevenage via Hertford North is currently closed. As a result, trains may be cancelled, delayed or revised.

Disruption is expected until 12:00.

Customer Advice:

A broken down freight train is blocking the line from Alexandra Palace towards Bowes Park, then towards Hertford North and Stevenage.

This is disrupting Great Northern services on this route. In reaction, trains in the opposite direction will also be affected.

Trains will be held at stations, diverted via Welwyn Garden City, revised to only complete parts of their journeys, or cancelled.

We don't have an exact estimate for a time when this will be resolved.

As a result, if your train is cancelled or no longer serving your station, please use another local public transport route, if there is one in your area.

You will still need to leave extra time to do this. As an approximate guide, please allow around 30-45 minutes of extra time. This will depend on your exact journey.

Ticket acceptance on alternative routes:

Your Great Northern ticket will be accepted at no extra cost on:

• London Underground services on any reasonable route, including Northern Line and Piccadilly Line services between Central London and North London
• Elizabeth line services between London Liverpool Street and Farringdon, for connections across London with Thameslink and other alternative routes
• London Buses serving any station between Central London and the Enfield area
• Greater Anglia services between London Liverpool Street and Hertford East
• London Overground services between London Liverpool Street and Enfield Town on any reasonable route via Highbury & Islington
• Thameslink and Great Northern services on any reasonable alternative route, including trains via Welwyn Garden City

Planning your journey: Live departure boards can be found here. You can view a live map of the network here. You can see an alternative route guide here. In the London area, you can plan journeys on alternative routes by using the TfL Journey Planner here. You can also use the app to find up-to-date information.

Can you tell me more about the incident?

At the moment, Great Northern are working with local staff and their colleagues at Network Rail to assess the situation and arrange a plan for the freight train to be moved.

Check before you travel:

You can check your journey using the National Rail Enquiries real-time Journey Planner.

Compensation:

You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.