Foster + Partners saw profit and revenue fall again last year as the firm’s founder said the government needed to get on and sort out a Brexit deal with the EU – or risk talent going elsewhere.

The country’s biggest architect carried out work in close to 50 countries last year including high-profile jobs for Apple at its campus in California as well as a series of store openings for the tech giant in major cities around the world including Milan.

But the firm’s founder Norman Foster, who turns 84 next June, said UK business was under threat from Brexit.

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