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Regulation

Regulation

Our five year plan

Every five years, we go through a process called the price review. During this process, we formulate our plans for the next five years. A limit is set for customer bills, approved by our regulator Ofwat.

Illustration of Thames employees interacting with customers

Browse our regulatory plans and information by topic

Drainage plans

Drought plan

Pollution incident reduction

Environmental information regulation

Our regulators

Trunk mains review

Water resources

Drainage and wastewater management

Abstraction incentive mechanism