Britain’s biggest ever security operation will protect George W Bush when he arrives in London for his controversial state visit tonight.

US president George Bush was arriving in Britain today for a four-day state visit expected to be marked by massive demonstrations against the war in Iraq.

A grandmother who scaled the gates of Buckingham Palace today is a veteran peace campaigner who has repeatedly trespassed on military bases.

Protesters were today gathering at Menwith Hill to register their opposition to President Bush’s decision to press ahead with the system.