The impact of Brexit and its effect on defence is weighing heavily on some MPs' minds, and they brought their questions to Parliament on Monday.
The Prime Ministertold the House on Monday: "Unless this House agrees to it, no-deal will not happen, No Brexit must not happen, and a slow Brexit - which extends Article 50 beyond 22 of May, forces the British people to take part in European elections and gives up control of any of our borders, money or trade is not a Brexit that will bring the British people together.
"I know the deal I have put forward is a compromise, it seeks to deliver on the referendum and retain trust in our democracy whilst also respecting the concerns of those who voted to remain.
"But if this house can back it, we could be out of the European Union in two months.
"There will be no further extensions, no threat to Brexit, and no risk of a no-deal.
"That, I believe, is the way to deliver the Brexit the British people voted for and I commend this statement to the House."
Watch: the defence industry plays a crucial role in the economy.
The defence industry supports 260,000 jobs, contributing on average 7 billion in exports each year, according to the MOD.
But even with disruption, experts say defence supply chains are interlinked and that the risk of trade damage is low.