"I presume you are reffering to BA and their plan to operate A319's out of London City with a refuelling tech stop to allow trans atlantic crossings, now that would be nice to see."
Actually, NO!
A.C. have up until recently been operating A319/20 from Canada to LHR. I think St. Johns, no doubt someone will correct if wrong. So the possibility is there, though I admit I'm not sure on the performance/ runway required to get to YYZ non stop in a 'bus
Would be 'nice to see' A.C. using BRS, although I'm not holding my breath.