Thames Water claims to be the biggest water and waste-water services business in Britain, supplying 2,600m litres of tap water every day to 8.5m customers in London and the southeast. It also says it is among the cheapest, with metered domestic customers paying an average of 73p a day for their water. Thames is spending £1 billion a year upgrading its network of water pipes and sewers. In 2006 the company was bought by a consortium led by the Australian investor Macquarie in an £8 billion deal. Led by Martin Baggs, the group had sales of £1,660m in 2010 and is reported to have £7 billion of debt.

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Company details
Year2010
Rank19
CompanyThames Water
ActivityWater services provider
LocationReading
Sales £m*1,660
Profit £m*1,057
Year endMar 10
Principal shareholdersConsortium led by Macquarie European Infrastructure Funds
Staff5,148
Founded1989
Websitewww.thameswater.co.uk

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* Supplied by company † Annualised figure