Non-Standard Sites

Learn about Non-Standard Sites and discover how to fulfil common tasks and processes.

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    What are Non-Standard Sites? 

    Non-Standard sites are unique gas sites that used to be maintained offline—but are now managed within UK Link.  

    Non-Standard Sites are divided into these groups: 

    • Shared Supply Meter Point (SSMP) sites – both National Transmission System (NTS) and Local Distribution Zone (LDZ) 
    • Telemetered sites – NTS and LDZ 
    • Optional tariffs – NTS Shorthaul and LDZ Shorthaul 
    • Interconnector sites 
    • Daily Metered Connected System Exit Point (DM CSEP) sites  
    • Connected System Operator (CSO) sites 
    • Twin stream (aggregated) sites 
    • Liquefied petroleum gas (LPG) sites 
    • Independent Gas Transporter (iGT) CSEP sites 

     

    Common tasks and processes 

    Non-Standard Sites have specific processes to follow when completing tasks related to supply points and metering.  

    These are explained for each site below. 

     

    Shared Supply Meter Point (SSMP) sites 

    All changes on SSMP sites need to follow the supply point administrations (SPA) process. Common changes include: 

    • New Shippers 
    • Leaving Shippers 
    • Changes of Agent 
    • Changes to and from LDZ Shorthaul 
    • Changes in % share 

    The administration of changes like these are automated for standard sites.   

    On Non-Standard Sites like SSMPs, Shippers and/or Agents need to complete a template to start the SPA process. You must:  

    1. Download the Shared Supply template   
    2. Complete the template and email it to xoserveinterface@xoserveservices.com 

    Read p23 of this document for more information on completing the template.  

    What happens next? 

    If your request is validated, each Shipper must send their confirmation using this CSS Template by email.  

    If there’s no objection, Gemini will be updated and relevant files sent to all parties. Site changes will then go live on an agreed date.   

    Shared Sites can’t make any changes, such as capacity referrals, without following the process outlined above.   

     

    Telemetered sites – NTS and LDZ 

    Telemetered sites use a variety of measuring equipment. 

    They don’t send readings. Instead, energy values are sent directly to National Grid and this information is then sent to Gemini.  

    All telemetered sites are held within – and invoiced through – UK Link. 

    Any requests for contract changes from telemetered sites should follow the standard SPA processes outlined above. Use the relevant template to get started.  

    Optional Tariffs – NTS Shorthaul and LDZ Shorthaul 

    To ask for an Optional Tariff, or have it removed, follow the SPA process outlined above. You’ll start by making a nomination using the relevant template 

    To be eligible for Optional Tariffs: 

    • NTS sites must be near an Entry Point (terminal) 
    • LDZ sites must be close to the NTS pipeline 

    Eligible sites can choose to take the following rates: 

    • NTS sites can take NTS Optional Tariffs 
    • LDZ sites can take NTS or LDZ Optional Tariffs 

    Both charges are calculated based on the distance from the terminal or notional NTS Entry Point. 

     

    Interconnector sites 

    Interconnector sites are set up like SSMP sites. The main difference is that each Shipper works independently. 

    There are three interconnectors: 

    • Bacton – ships gas to and from Belgium 
    • Moffatt (IUK) – ships gas to Ireland and from Norway 
    • BBL – ships gas to and from the Netherlands 

    To register to an interconnector – or complete another request – follow the standard SPA process outlined above.  

    Interconnector requests don’t require a nomination, just a confirmation. There’s also no objection window. 

    Choose the correct template from: 

    • Confirmation process   
    • Confirmation cancellation process   
    • Withdrawal process   

    Complete the template and email to nonstandardsites@xoserve.com  

    For more details on completing the template see p31 and 32 of this document 

    All interconnector sites are classed as telemetered in UK Link. 

     

    Daily Metered Connected System Exit Point (DM CSEP) sites  

    Sites located on an Independent Gas Transporter’s (iGT) Network are known as a CSEPs.  

    They’re called DM CSEPs when the annual quantity of gas used is more than 58,600,000 kWh. Or when a site is an Interruptible Supply Point (DNI).  

    Any requests related to these sites should follow the standard SPA processes shown above.

     

    Connected System Operator (CSO) sites 

    CSO sites are CSEP sites that operate under a different Transporter licence to an iGT.  

    To set up a project on these sites, contact the Network. They’ll guide you through what’s required, including providing details of the project and creating an M Number.  

     

    Twin stream (aggregated) sites 

    A twin stream site has multiple meters attached to one Supply Meter Point. Each meter can have a convertor and daily read equipment (DRE/AMR) attached.   

    Reads from each meter are received and stored as normal. The total volume and energy is then aggregated and stored in an ‘aggregate’ device.  

    Twin stream assets can be configured and changed by:  

    • asking Xoserve to investigate twin stream issues on existing sites. This includes when a twin stream meter isn’t reflected on UK Link 
    • using RGMA flows from an ONUPD/ONJOB file  

    Email nonstandardsites@xoserve.com to request these changes. 

    Twin stream sites can be part of shared supply scenarios, telemetered and on Optional Tariffs.  

     

    Liquefied petroleum gas (LPG) sites 

    LPG sites are part of small, independent systems serving communities not connected to the main gas system.  

    There are independent systems in Scotland (Campbeltown, Oban, Thurso, Wick and Stornoway) and Wales (Llanfyllin and Llanwrtyd Wells). 

    Independent Gas Transporter iGT (CSEP) sites 

    iGT sites follow most of the processes for standard sites. The main difference is around site set-up.  

     

    Find the right template 

    See which templates you need to request changes on SSMP and interconnector sites. 

    Shipper and Agent templates for SSMP 

    The table shows the templates and file formats required for SSMP sites.

    File 

    Description 

    Sent From 

    Sent To 

    SNO 

    Nomination 

    Shipper/Agent 

    Xoserve 

    SNR 

    Nomination response 

    Xoserve 

    Shipper/Agent 

    CSS 

    Confirmation 

    Shipper 

    Xoserve 

    CRS 

    Confirmation response 

    Xoserve 

    Shipper 

    ANT 

    Agent Notification 

    Xoserve 

    Agent 

    WOR 

    Objection & Withdrawal response 

    Xoserve 

    Shipper 

    WRS 

    Objection & Withdrawal request 

    Shipper 

    Xoserve 

    TRS 

    Transfer of Ownership 

    Xoserve 

    Shipper 

    MRI 

    Meter reading & Access instructions 

    Xoserve 

    Shipper 

    DCF 

    Discontinued confirmation notification 

    Shipper 

    Xoserve 

    PAC 

    Pre transfer asset change notification 

    Shipper 

    Xoserve 

    DNE 

    Energy amendments to Allocation Agent 

    Xoserve 

    Agent 

    DNR 

    Energy amendments allocation from Allocation Agent 

    Agent 

    Xoserve 

     

    Shipper templates for interconnectors 

    The table shows the templates and file formats for interconnectors

    File 

    Description 

    Sent From 

    Sent to 

    RCI 

    Confirmation 

    Shipper 

    Xoserve 

    OCI 

    Confirmation response 

    Xoserve 

    Shipper 

    TNI 

    Ownership 

    Xoserve 

    Shipper 

    IWT 

    Withdrawal 

    Shipper 

    Xoserve 

    IWR 

    Withdrawral response 

    Xoserve 

    Shipper 

    CNI 

    Ceased responsibility 

    Xoserve 

    Shipper 

    TSI 

    Tariff Switch 

    Shipper 

    Xoserve 

    TSR 

    Tariff Switch Response 

    Xoserve 

    Shipper 

    TSF 

    Tarif Switch Referral Response 

    Xoserve 

    Shipper 

     

    File formats

    Find all the file formats available for your use, here

    View

    Templates

    View all templates available for use, here

    View

    Access request

    If you're having trouble accessing the file formats and templates, you can request access, here

    Request access

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