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Boeing's big rival Airbus, which employs more than 6,000 people in Britain, has warned it may be forced to scale back investment if Britain crashes out of the EU with no deal.
Immigration is a divisive issue in Britain, and reducing the number of newcomers was a major factor for many who voted in 2016 to leave the European Union.
The government has acknowledged that could leave lanes grounded and trucks backed up at British ports. Raab warned that any chaos following a "no deal" Brexit would be the bloc's fault.
On Friday May said that Brexit talks with the European Union were deadlocked, challenging the bloc to come up with its own plans.
Before a two-day European Union summit starts on Wednesday evening, May showed no sign of backing away from her Brexit plan.
May has repeatedly ruled out holding a second referendum following the vote two years ago to leave the EU.
Britain voted for Brexit in June 2016, but May has so far been unable to present a common position to Brussels on what she wants because of deep divisions in her government.
Prime Minister Theresa May on Monday hailed the deal struck on the first stage of Brexit talks, saying it proved Britain could leave the European Union in a "smooth and orderly way".
Britain voted with 52 per cent in favour of leaving the European Union in a referendum last year.