Marks & Spencer has admitted sales at its flagship Chinese store have slumped since its grand opening in three months ago.

The 40,000sq ft store on West Nanjing Road, Shanghai’s equivalent of Oxford Street, has been struggling amid difficulty in getting stock through customs and marketing Western goods to the local population.

A spokesman for Marks & Spencer said the company was still 'happy with progress at the store,' but conceded sales had dropped considerably since the 'incredible few days' after the store open in October.

Daily Telegraph