We are seeking views on our assessment of GB’s long-term supply of gas, and proposed policy actions to protect our gas and energy security during the transition.
Source
https://www.gov.uk/government/consultations/gas-system-in-transition-security-of-supplyDocument officiel chez le régulateur. Citez toujours cette URL — et non la page de détail Vantage — dans les preuves de conformité.