Brexit changed the dynamics of this argument for some ministers. You have to look mad keen for business opportunities, you can't afford to play into a narrative that Britain is turning inwards.
Camilla Cavendish, head of policy for David Cameron in No. 10, says it's the thought of sitting through Brexit debates in parliament that drove David Cameron out of parliament.
David Cameron's last Prime Minister's Questions showed him at his best. It was astute, witty and self-deprecating. But history will cast it aside.