A survey by consumer magazine Which? has found that women are frequently being measured wrongly for bras in store fittings.

The study, which involved 11 mystery shoppers testing out five high-street chains, found that only six out of 75 fittings found the correct measurement for the consumer.

The worst fitting was at a London branch of department store Debenhams, where an 80-year-old woman was recommended to buy a bra in a similar style to a Wonderbra, the garment designed for maximum cleavage, and favoured by young women on nights out.

Department store John Lewis came out the best, but still only managed four fittings rated as 'good', out of a total of 15.

13 visits at both Marks & Spencer and Debenhams resulted in a 'poor' fitting; while 12 fittings at La Senza were ranked poor, as were 11 at House of Fraser and 10 at John Lewis.

Many of the mystery shoppers were sold bras with cup sizes too small, and two-thirds were recommended bras with an incorrect underwire shape for them.