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  • Network interface - High Speed 1

    You may own adjacent land or need to build facilities, transport or infrastructure, or place utility apparatus on or near to the High Speed 1 rail network

  • If you do, then we need a close working relationship. An integral part of our role is to manage the activities of outside parties who want to carry out works on or near to the railway, or to build bridges under or over land or where that activity impacts in some way on the rail network.

    If your building work is NOT alongside HS1 but on another part of our network then please visit our Network Interface page.

    The High Speed 1 railway, formerly known as the Channel Tunnel Rail Link (CTRL), is different from the rest of the rail network in that Network Rail (High Speed) operate and maintain it on behalf of HS1. This interface is dealt with by Network Rail (High Speed) Outside Parties team.
    Network Rail (High Speed 1) Outside Parties Team Charter (90 KB)

    Managing risk to HS1

    If you are planning work near to HS1, we can help with our infrastructure search service.

    We can tell you about:

    • Historic or as-built structures
    • High Speed 1 property boundaries
    • Any HS1 buried services in the area

    Please complete and send us an infrastructure search request form:
    Infrastructure Search request form (550 KB)

    If you need more information, please email

    All work of this nature, no matter how small, presents a risk to the operational railway or the rail infrastructure and vice-versa. The railway environment is a dangerous one and can impact upon your works. We would be pleased to explain these risks to you.

    Within the Outside Parties team, we have engineers committed to managing the impact on High Speed 1 from the works of the developers and providing advice to anyone planning activities near the railway.

    Initially please consult the development handbook below which answers many questions.
    Development handbook (500 KB)

    Businesses bordering HS1

    If your business borders HS1, please read our leaflet which explains how you can help keep the line safe and secure. There is an accompanying poster that you can print out for your workplace.

    Working together leaflet (1.95 MB)
    Working together - poster (1.4 MB)

    For more information call 08457 11 41 41 or email


    Outside Parties do not deal with emergencies - please call Emmis on 01233 739 450.

    Help us to help you

    To help us answer your enquiry, please complete our development questionnaire.
    Development questionnaire (195 KB)

    To submit the questionnaire or for any other initial contact, email