I have posted this article by Elizabeth May before but the first 3 points need to be repeated.
1) First prime minister of Canada to prorogue to avoid political difficulties since Sir John A Macdonald, and Macdonald, on return, immediately went to an election.
2) First Canadian prime minister to prorogue twice to avoid political difficulties.
3) Only prime minister in the entire Commonwealth in the last 100 years to prorogue to avoid a political difficulty. (The prime minister of Sri Lanka tried once, but the Governor General refused).