Hundreds of music fans have been turned away from a festival after finding their tickets were fakes.
Live Nation, promoters of this weekend's Barclaycard Wireless Festival, said many of those who had purchased tickets from third party websites such as Gumtree and eBay have been refused entry as their tickets are counterfeit.
The three-day event at Hyde Park has seen 65,000 revellers enjoy performances by acts including Nicki Minaj and Professor Green, while Rihanna headlines on Sunday.
Live Nation said the fraudulent tickets had been created by parties preying on music fans who did not use official ticket outlets.
More top news
The march took place on the second anniversary of the EU referendum.
The rapper J Hus has been charged with carrying a knife after being arrested in east London.
The World Health Organisation has just classified gaming disorder as an addiction.