I've just been looking on www.aircanada.com and I notice they are showing fares from MAN/GLA to YYZ for £249.00 + tax for the end of June!.
This is not an advert and I don't work for AC. I just thought anyone planning a trip to YYZ would be interested in this amazing price. I booked my trip in Febuary and I paid a lot more than that . I presume they are trying to compete with Fly Zoom.