A Tesco mailout promotion at its new Cumbernauld Extra store in Scotland offers shoppers £4 off a £20-shop for a four-week period. Tesco is also offering shoppers at the store £2 off a taxi ride home if they spend £10 or more.

A spokesman said the promotion was introduced because of the low rate of car ownership in the area.

Competition in the area was fierce with an Asda store just down the road,he added.