Last fall was on a LHR-YOW flight with Her Excellency Madame Clarkson. Was late off a connecting Aer Lingus flight from Dublin and the AC T1 flight connection centre staff hustled me down to the tarmac and into a waiting car. Was whisked literally under the planes over to the waiting 767-300 (CP metal then). Just as we got out a mini van pulled up and out came Her Excellency, an EA and one security type. We all walked up the jetway stairs together and boarded. She is most personable (she is journalist after all) and we settled into the 3/4 full J cabin. Guess folks thought I was part of her entourage.
Others will correct me but I believe as our Head of State was on board we received preferential treatment by air traffic control. We taxied DIRECTLY out to the runway and took off ... bybassing many waiting aircraft. Our flight time was 20 mins shorter due to a southerly assignment of the Atlantic air corridor (pilot told me yes we did get the "best" routing).
Funny note: as H.E. had just the day before presented HRM The Queen Mother with her honorary Order of Canada, the CBC news shown on board featured a short clip of the ceremony. H.E. (with headset on) turned to her EA and in a loud voice said "my that looked pretty good didn't it?" everyone in J laughed!
Huge crowd of Rideau Hall types were on the jetbridge to greet H.E. but she did actually pass through Customs (escorted by what looked like the chief Customs pooh bah at YOW) like the rest of us!