Tariffs and areas An overview of the tariff areas and current tariffs. Tariffs and areas Unit tariff forecast 2023 – 2026 (1.2.22) Tariff view 2023 Tariff view 2023 Excel Historical tariff overview SEGAL-tariffs AreaUnitTariff GY2022*SEGAL exitGBP/Sm30,0396* Tariff is escalated every gas year with UK Producer Price Index, Electricity Pricing and NBP Month Ahead Pricing. Interruptible capacity currently under development.