Westjet were operating two cargo flights a week throughout most of the winter, and are up to the dizzying heights of four passenger flights a week right now. If Ukraine, Pegasus, Jazeera, Rwandair, Blue Air, Vistara, Loganair and just about every Chinese airline could get temporary slots into LHR, I’m sure Westjet could have, especially if they “don’t actually want to be at LGW”.