The Old Street roundabout is to be given a £50 million makeover to become a centre for technology start-ups and entrepreneurs. It will become Europe's largest civic indoor space, hosting classrooms and workshops equipped with the latest 3D printing technology.
Several large international firms have also announced new investments in the area, including Microsoft, IBM and KPMG.
Boris Johnson says ''our new centre will provide not only a vital resource to nurture upcoming technology and creative superstars from around the world, it will drive huge investment into the capital and help create thousands of jobs''
Digital Firm Editd is one company which says it can't get the right expertise - as the government promises to invest in London's 'Tech City'
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The operation carried out by Westminster City Council led to the seizure of £8,000 worth of cigarettes.
Armed troops have been stationed around Parliament to free up armed police to patrol the streets in the wake of the Manchester bomb attack.
Chelsea had planned an open top bus tour to show off the Premier League trophy and hope to add the FA Cup in Saturday's final with Arsenal.