Northern Ireland Protocol

In difficult negotiations, the late, great Ronald Reagan used to say, “Trust but verify,” which I took to mean, “Be optimistic but have a reserve plan.” It sounds as if the reserve plan here is the Stormont brake, but as my right hon. Friend the Member for North West Cambridgeshire (Shailesh Vara) said, that might not apply if, for any reason, Stormont was not sitting. Is the Prime Minister satisfied that there is a plan B that would work under all circumstances?