Calgary is crying out for a competitor - a great route which BA gave up years ago.
BA have been back on LHR-YYC for a few years, it's going B787 soon I believe.
YVR is so popular but VS do summer only - YYZ try getting a J seat on AC? - full full full
Again, Vancouver is proving to be a difficult nut to crack, it was not certain to return after a difficult first year. Chicago still remains summer only.
Let's put it another way. Virgin initially piled into New York, Boston, Miami, San Francisco and Los Angeles where they stole a fair amount of point to point traffic from BA. BA then raised their game and later forays into Toronto, Chicago and Vancouver have not seen the same success. Virgin's customer's are loyal to a fault however they have failed to add to that core loyalty in the new markets they have entered I think.