Victoria Henry, currently one of six Greenpeace activists climbing exterior of The Shard, says the team has nearly reached the top of the building.
Update. Still safe, still hanging on. Not gonna lie, it's exhausting. Into final stretches now #iceclimb
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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.