Document Generated: 2022-06-22 Status: This is the original version (as it was originally made). Column 1 Column 2 Column 3 Relevant sectors subsectors designated competent authorities Drinking water supply Drinking water The Secretary of State for Environment, Food and and distribution supply and Rural Affairs (England) distribution The Welsh Ministers (Wales) The Drinking Water Quality Regulator for Scotland (Scotland) The Department of Finance (Northern Ireland) Digital Infrastructure Digital Infrastructure Office of Communications (United Kingdom) SCHEDULE 2 Regulation 8 Essential Services and Threshold Requirements The electricity subsector 1.—(1) This paragraph describes the threshold requirements which apply to specified kinds of essential services in the electricity subsector. (2) For the essential service of electricity supply the threshold requirements are— (a) in Great Britain— (i) electricity undertakings that carry out the function of supply to more than 250,000 final customers; or (ii) electricity undertakings that carry out the function of supply, and generation via generators that when cumulated with the generators operated by affiliated undertakings would have a total capacity, in terms of input to a transmission system, greater than or equal to 2 gigawatts; (b) in Northern Ireland— (i) the holder of a supply licence under Article 10(1)(c) of the Electricity (Northern Ireland) Order 1992(23) who supplies electricity to more than 8,000 consumers; and (ii) the holder of a generation licence under Article 10(1)(a) of the Electricity (Northern Ireland) Order 1992 with a generating capacity equal to or greater than 350 megawatts. (3) For the essential service of the single electricity market in Northern Ireland, the threshold requirement is the holder of a Single Electricity Market operator licence under Article 10(1)(d) of the Electricity (Northern Ireland) Order 1992(24). (4) For the essential service of electricity transmission, the threshold requirements are— (a) in Great Britain— (i) transmission system operators with a potential to disrupt delivery of electricity to more than 250,000 final customers; (23) S.I. 1992/231 (N.I. 1). Article 10(1)(c) was substituted by regulation 6(1) of S.R. 2007 No. 321; there are other amendments to this instrument but none are relevant. (24) Article 10(1)(d) was inserted by article 4(4)(b) of S.I.2007/913 (N.I. 7). 23