Pink Floyd bassist to perform in London in solidarity with Assange. Roger Waters, bassist and vocalist for Pink Floyd, will reportedly performed his iconic song Wish You Were Here in front of the British Home Office, in solidarity with Julian Assange. According to the Stop the War Coalition on Twitter, the performance by the famous musician, also known for his political activism, will be next Monday at 18:00 local time, as part of a campaign for freedom of expression, and against the eventual extradition of the founder of WikiLeaks to the United States. Assange was arrested last April 11 at the Ecuadorian Embassy in London, after the government of that country withdrew the political asylum he was granted seven years ago. Expeditiously tried by a British court, the Australian cyber activist is now serving a 50-week prison sentence in Belmarsh Maximum Security Prison for violating bail granted in 2012 in connection with alleged sexual offences committed in Sweden.