Originally Posted by Mojo
No. I have already linked to Parliament's own website where it has prorogation under the evolution of Parliament and its short history of how prorogation started "in centuries past" and how it has developed.
Interestingly, the website has prorogation in the section titled "Offices and Ceremonies"
That is what was being argued by some Tories, such as Sir Christopher Chope (he of upskirting fame). They did not think proroguing was a law, they thought it was a procedure set by Parliament. But the SC pointed out that proroguing was a power not set by Parliament, it came from the Monarch and as such is justiciable. It is a law created that allows the Monarch to end Parliaments.