new Energy Minister John Battle MP also emphasising the government's social obligation to protect the poorest households and its environmental commitments. The Labour Government introduced Winter Fuel Payments for people aged over 60 and, in its first major piece of energy legislation, passed the Utilities Act 2000. This legislation implemented a licensing system for energy suppliers and created the Gas and Electricity Market Authority and Ofgem as a regulator, and the Gas and Electricity Consumer Council (known as Energywatch) as a statutory body with responsibility for protecting and promoting the interests of gas and electricity consumers in Great Britain. In 1999, the process of full liberalisation of the gas and electricity markets had been completed when all UK households were able to switch their gas or electricity supplier. Households were encouraged to save money on their gas and electricity bills by switching between different energy providers, with about a third of gas and electricity customers switching between 1998 and 2003. By the mid-2000s, the market was dominated by what became known as the Big Six energy suppliers, consisting of British Gas, EDF Energy, E.ON, Npower, Scottish Power, and SSE. Parliament also passed the Warm Homes and Energy Conservation Act 2000, a private member's bill introduced by Conservative MP David Amess, which set out the government's Fuel Poverty Strategy – defining "fuel poverty" as any household living on a lower income in a home which cannot be kept warm at reasonable cost – with a commitment to eliminate fuel poverty by 2016. In 2008, Ofgem launched its Energy Supply Probe as its first major investigation of competition in the electricity and gas markets since the full liberalisation of the two markets. The probe found there were a range of features in these markets that weakened competition, but found no evidence of a cartel or that retail energy price rises could not be justified by wholesale costs. 2010 to 2017: Energy Act In the run-up to the 2010 election, the Labour Government passed the Energy Act 2010. Among other reforms, this introduced the Warm Home Discount scheme, which came into effect in 2011, and which placed a legal obligation on larger energy suppliers to deliver support to people living in fuel poverty or in a fuel poverty risk group. This replaced a number of other schemes giving reduced tariffs to some low-income customers. Partly in response to increasing concerns about the pricing