Four people have been charged by police after activists chained themselves to gates at Buckingham Palace.
They have been accused under the Serious Organised Crime and Police Act and for breaching regulations controlling Royal Parks in London.
Two men from London, a man from Reading and a woman from Horsham, West Sussex are all due to appear at Westminster Magistrates' Court on 10 July.
They were arrested after a climate change protest on Saturday.
Those charged include Peter Coville, 45, from Riverside Court in Reading, and Fiona Brooke, 23, of Billingshurst Road in Horsham, Sussex.
The other two due in court are Cyril Zeldine, 33, of John Islip Street in Pimlico, south west London, and Philip Thornhill, 57, of Rockmount Road in Woolwich, south east London.