The York & Albany, a Grade II listed building close to Regent’s Park, has had its windows boarded up, and a notice affixed to a door declared that the organization was entitled to use the space.
Film director Gary Love bought the former 19th-century coaching inn and leased it to Ramsay for a quarter of a century at a cost of £640,000.
After a failed attempt to vacate the lease in a 2015 High Court dispute, Ramsay put the facility up for sale at the end of last year, with a £13 million target price.
On Saturday morning, two people were observed leaving the pub, both with rucksacks and carrier bags and dressed in black tracksuits and masks.