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.
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The curious marsupial went for a late night stroll round the A&E department before casually going back out the way it came.
There will be a mixture of bright spells and scattered - possibly thundery - showers today.
As the election campaign draws to an end, the Liberal Democrat leader says that voters face “the biggest political decision" of their lives.