https://phys.org/news/2018-07-rolls-royce-brexit-uncertainty.html > "We can't rely on anything. So the white paper ... was incrementally positive in terms of the content," said Rolls-Royce chief executive Warren East at a round-table event on the sidelines of Farnborough Airshow. > "But it still leaves loads of unknowns. And we've got a business to run.