materially

"But it is important to this process, which starts with establishing a true record of what did and did not happen, and to all those affected, that the definitive account records what is materially correct."

No 10 argued today that the "depth and extent" of that relationship was "materially different" from what was known last year.

In a statement, the Foreign Office said the move followed the emergence of emails showing "the depth and extent" of the pair's relationship was "materially different from that known at the time of his appointment".

A senior party source told me: "The test is how does the PM show how No 10's capacity for political strategy and policy making have materially changed?"

Something is materially different in our country this week than last.