Police will "fully assess" a recording of comments apparently made by Rupert Murdoch during a meeting with News International journalists.
Assistant Commissioner Cressida Dick confirmed the force is trying to get a copy of the clip of Mr Murdoch speaking to members of staff from the Sun in March.
More top news
The band announced at a free concert on Friday that they would take over the event's Pyramid stage on Saturday June 25.
The victims were collecting permits and escorts a day after their home town was liberated from the extremists.
Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.