British Airways is currently running a shopping promotion aimed at overseas visitors called “The Big British Invite”.
One of the promotions is an interesting range of shopping discounts:
Up to 20% off at Westfield Shepherds Bush or Stratford
15% off at McArthur Glen outlets
10% off at Bicester Village
10% off at Amanda Wakeley
10% off at Burlington Arcade
10% off at Liberty
…. amongst others.
Full details can be found here. This is the BA China site and it also appears on the Indian site.
You will need to show an international (ie long haul) British Airways boarding pass to receive your discount. Theoretically, it is only open to non-UK residents, but that is going to be a tricky one to disprove!
Most of the offers run until the end of March.