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RIIO-2 NZASP Re-opener Draft Determinations: NGN Birkshall Rationalisation and Relocation Works Project

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As part of the RIIO-2 price control, network companies can apply for additional allowances via the Net Zero Pre Construction and Small Net Zero Projects (NZASP) Re-opener uncertainty mechanism. 

In August 2024, we received an application from Northern Gas Networks (NGN) requesting additional allowances for its Birkshall Rationalisation and Relocation Works project. 

We are now consulting on our draft determination and draft direction for this application.

Respond name

Catherine Warrilow

Respond email

ReopenerConsultations@ofgem.gov.uk

Main document

[RIIO-2 NZASP Re-opener DD - NGN Birkshall Rationalisation and Relocation Works Project [PDF, 329.19KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-01/RIIO-2-NZASP-Re-opener-Draft-Determinations-NGN-Birkshall-Rationalisation-and-Relocation-Works-Project.pdf)

Response documents

[NGN Birkshall NZASP: confidential response [PDF, 38.21KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-06/NGN-Birkshall-confidential-response.pdf)

[NGN Birkshall NZASP: NGN response [PDF, 238.86KB]

](https://www.ofgem.gov.uk/sites/default/files/2025-06/NGN-Birkshall-NGN-DD-Response.pdf)

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