[FINAL] Annex 1 - Table of essential services and identification thresholds Sector Subsector Essential service Identification thresholds Drinking n/a water supply and distribution The supply of potable water to households. Operators serving 200,000 or more people. Energy The function of supply (the sale or resale of electricity) to consumers. In England, Scotland and Wales: Electricity Electricity suppliers (incl. aggregators where they act as suppliers) that meet the following two criteria (both must apply): ● use of smart metering infrastructure; ● supply greater than 250,000 consumers. Operators of electricity generators* with a generating capacity greater or equal to 2 Gigawatts (GW), including: ● Standalone transmission connected generation; ● Multiple generating units with a cumulative capacity greater or equal to 2 Gigawatts (GW); *excluding nuclear electricity generation. The government does not consider the civil nuclear sector to be in scope of the NIS Directive; In Northern Ireland: Licensed suppliers who supply to greater than 8,000 customers Any generator with a generating capacity equal to or greater than 350 MW Electricity (SEM Operator) The holder of a SEM operator licence under Article 8(1)(d) of the Electricity (NI) Order 1992. Electricity (transmission). In England, Scotland and Wales: Network operators with the potential Page 18