On 23 November 2009, Ofgem published Leakage Model Approval letters covering each of the Distribution Networks.
These can be found at: www.ofgem.gov.uk/Networks/GasDistr/GDPCR7-13/Pages/GDPCR7-13.aspx
Related Files
Shrinkage and Leakage Model Review Consultations
On 23 November 2009, Ofgem published Leakage Model Approval letters covering each of the Distribution Networks.
These can be found at: www.ofgem.gov.uk/Networks/GasDistr/GDPCR7-13/Pages/GDPCR7-13.aspx