This is an eyewitness report from the NowPublic member peter marshall who was on the scene.
my london diary
Swap Don't Shop Topshop, Oxford St, Sat 29 Nov
"Take your clothes off! Swap them with your friends for FREE!" was the message from the Space Hijackers, who decided to set up their clothes swap - "the restyling fashion mash-up event of the year" - which started on the lower ground floor of TOPSHOP at Oxford Circus. The idea was to demonstrate that "we don't need to spend money we don't have on things we don't need."