Some of the UK’s biggest food and drink companies pledged to cut their use of water in a move that could save them a total of £60m a year.

A group of 21 companies agreed to cut their water use by 20 per cent by 2020, including Birds Eye Iglo, Cadbury Schweppes, GlaxoSmithKline, Nestlé UK, Premier Foods, Tate & Lyle, Unilever and United Biscuits.