Delegates for a private conference of top politicians and businesspeople from around the world have started to arrive at a luxury country hotel in Herefordshire.
Several cars with blacked-out windows entered the gates of the Grove Hotel, near Watford, this morning for the secretive meeting of the Bilderberg Group.
It is thought executives from multi-national companies such as Amazon and Google, and high-ranking political figures including Chancellor George Osborne will be among the 130 or so attendees.
Members of royal families are also expected to attend the meeting
Amid tight security, a handful of protesters gathered in a fenced-off area just inside the grounds of the hotel and heckled cars as they drove past.
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Five people were killed and dozens more were injured after a car and knife attack in the capital on Wednesday afternoon.
Among those expected to attend the ceremony will be former US President Bill Clinton and ex-Northern Ireland first minister Peter Robinson.
Five people have been killed and 40 injured after a car and knife attack in London on Wednesday.