John Lewis and Waitrose to dim lights and cut temperatures to save energy

Partnership firm predicted it will overspend on power by 18m without action such as supermarket chain going to half lighting'

John Lewis is to turn down the temperature in its department stores and Waitrose supermarkets will dim their lights in an attempt to get runaway energy bills under control.

The staff-owned John Lewis Partnership, which includes Waitrose, said its energy bill is threatening to go nearly 20m over budget.