Eco-zealots from Free Fossil London gathered inside the five-star InterContinental Hotel near Hyde Park , central London, to stage a demonstration last night.
Retired Dr Grahame Buss, 68, worked as a Principal Scientist for Shell for 33 years but now appears as a spokesman for the Just Stop Oil climate campaign.
Andy Murray has said there is a good chance Wimbledon will be disrupted by a Just Stop Oil protest - but warned activists against targeting The Championships.