Hi and welcome to HCM
From medical point of view this may bit too early for some long trips since full recovery from such procedures is between 6-8 weeks. But if you ask me, flight has minor effect on intraabdominal organs and digestion so it shouldnt cause anything significant for your health. This recovery will be same in england and canada.
So I wouldnt say that it is forbidden to have flights and trips if you feel fine. Nausea
is expected, but vomiting
in first hour after food intake or absence of feces would be alarming signs and if this happens you should see doctor ASAP. Otherwise, just have easier food,drink more fluids and take antiemetic before flight. Wish you good health. Regrads