Question: Ardleigh Reservoir supplies water to what company that is regulated under the United Kingdom Water Industry Act 1991?

full_context: Document 1: Alexandria Water Company: The Alexandria Water Company (AWCO) is the water company of the city and the governorate (province) of Alexandria, Egypt. It was founded in 1860 as a private company and it operated as such for more than 100 years before it was nationalized under the rule of Gamal Abdel Nasser. At that time it became the Alexandria Water General Authority (AWGA), a department of Alexandria Governorate in charge of both water supply and sewerage. In 2004, through a country-wide sector reform it became a commercially oriented company under private law. The sewerage and wastewater treatment functions were transferred to a separate company, the Alexandria General Organization for Sanitary Drainage (AGOSD), later renamed to Alexandria Sanitary and Drainage Company (ASDCO). The water utility became a company under private law, reverted to its old name AWCO and gained some operational independence. Both AWCO and ASDCO are part of the government-owned Holding Company for Water and Wastewater, which owns all utilities in Egypt. AWCO serves 4.5 million inhabitants, a number that increases to 6 million during the summer season. The Alexandria water utility is one of the better-performing water service providers in Egypt, ranked fifth among 22 water utilities by the Egyptian Water Regulatory Authority in 2012/13.
Document 2: Dee Regulation Scheme: The River Dee regulation scheme is a system of flow balancing and quality management along the River Dee managed by a consortium of the three largest water companies licensed to take water from the river, United Utilities, Welsh Water and Dee Valley Water; together with the regulator, Natural Resources Wales.
Document 3: College Lake nature reserve: College Lake is a 65 hectare nature reserve in a former chalk quarry in Pitstone in the Aylesbury Vale district of Buckinghamshire. It is one of the flagship reserves of the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust, and it has an information centre, education facilities, a café, toilets and a shop. It is in the Chilterns Area of Outstanding Natural Beauty. The area east of the lake is a geological Site of Special Scientific Interest called Pitstone Quarry.
Document 4: Brock Reservoir: Brock Reservoir is a man-made reservoir located near Gordons Well, California. When a water request from Lake Mead is made, it takes time to travel the canal system to its destination. If the request is changed or canceled before it reaches its destination, the water is diverted to Brock Reservoir for storage. It has a small maximum volume of only 8000 acre ft , but is expected to be filled and emptied many times each year. It holds water from the All-American Canal until it can be used for nearby agriculture.
Document 5: United Utilities: United Utilities Group PLC (UU), the United Kingdom's largest listed water company, was founded in 1995 as a result of the merger of North West Water and NORWEB.
Document 6: Briar Creek Reservoir: The Briar Creek Reservoir (also known as Briar Creek Park Lake or Briar Creek Lake) is a reservoir in Columbia County, Pennsylvania, in the United States. It has an area of 51.04 acres and is located in Briar Creek Township. The lake is situated on East Branch Briar Creek. The lake was constructed in the early 1970s for the purpose of flood control. It is dammed by the Briar Creek Dam. Shale and limestone rocks are found in the lake's vicinity. The lake was electrofished by the Pennsylvania Fish and Boat Commission in 2010. The reservoir is designated as Approved Trout Waters and is stocked with trout. More than a dozen species of fish inhabit it and several bird species are found in its vicinity. The lake is part of the 173-acre Briar Creek Lake Park. Fishing and boating are done in the reservoir.
Document 7: Water Industry Act 1991: The Water Industry Act 1991 (c. 56) is an Act of the United Kingdom Parliament consolidating previous enactments relating to the water supply and the provision of wastewater services in England and Wales. It further implemented recommendations of the Law Commission.
Document 8: Ardleigh Reservoir: Ardleigh Reservoir is a 120 acre lake near Colchester in Essex constructed in the valley of the Salary Brook. It supplies water both to Anglian Water and to Veolia Water East. The lake is also used for recreational activities including sailing and angling. Both game and coarse fish are present including pike and zander.
Document 9: Swimming River Reservoir: The Swimming River Reservoir is a reservoir in Monmouth County, New Jersey. It is located on the border of Colts Neck and Lincroft. The Swimming River ends up in the reservoir, as well as other small tributaries. The Swimming River Reservoir is managed by New Jersey American Water Company and provides drinking water for residents of Monmouth County. The reservoir has a design peak capacity of 159 megalitres per day. All drainage from Colts Neck empties into the reservoir.
Document 10: Bellamy Reservoir: Bellamy Reservoir is a 333 acre impoundment located in Strafford County in eastern New Hampshire, United States, in the town of Madbury. An eastern arm of the lake extends a short distance into Dover. The reservoir serves as the primary water supply for the city of Portsmouth, New Hampshire. Its outlet is the Bellamy River, a tributary of Great Bay, a tidal estuary connected to the Atlantic Ocean by the Piscataqua River.
Document 11: Pikes Creek Reservoir: Pikes Creek Reservoir (also known as Pike Creek Reservoir or Ceasetown Reservoir) is a reservoir in Luzerne County, Pennsylvania, in the United States. It has a surface area of approximately 400 acre and is situated in Lehman Township, Jackson Township, and Plymouth Township. The lake is situated on Pikes Creek. It has a volume of approximately 3 billion gallons and is used as a water supply reservoir. As of 2013, it is inhabited by fifteen fish species. The reservoir is owned by the Pennsylvania-American Water Company, but shoreline fishing is permitted at designated spots.
Document 12: West Anglia Great Northern: West Anglia Great Northern was a train operating company in England owned by National Express, that operated the West Anglia Great Northern franchise from January 1997 until March 2004 and the Great Northern franchise from April 2004 until March 2006.
Document 13: Anglian Water: Anglian Water is a water company that operates in the East of England. Anglian Water is regulated under the United Kingdom Water Industry Act 1991.
Document 14: Northern Ireland Water: Northern Ireland Water Limited (Irish: "Uisce Thuaisceart Éireann" ; Ulster-Scots: "Norlin Airlan Wattèr") is a water company in Northern Ireland. Formerly an executive agency (the Northern Ireland Water Service) within Northern Ireland's former Department for Regional Development, it became a government-owned company on 1 April 2007. The company provides 625 million litres of clean water a day for almost 1.7 million people as well as treating 134 million m of wastewater every year, and has approximately 1,400 staff. It is responsible for 26,500 km of watermains and 14,500 km of sewerage mains, as well as 47 water treatment works and 918 wastewater treatment works. In 2005, the Water Service had an annual budget of £302 million and fixed assets of £4.9 billion.
Document 15: Bristol Water: Bristol Water supplies 266 million litres of drinking water daily to over 1.2 million customers in a 2600 km2 area centred on Bristol, England. It is regulated under the Water Industry Act 1991. Sewerage services in the Bristol area are provided by Wessex Water.
ground_truth: Anglian Water