An employee for Hearst TV, who works in the building where the workers are trapped, has tweeted that the lower three floors have been evacuated in case the scaffold collapses.
More top news
Philip Hammond's financial commitment to the NHS in this year's Budget falls short of what is needed according to hospital bosses.
As well as preparing his speech the Chancellor had spent some time preparing his gags, one of which included a prop.
An overview of the reaction to key policies in Chancellor Philip Hammond's 'forward thinking Budget'.