a) How many threads need to be started today for the possible job action by UK immigration officers?

b) How will routing via BRU get you less miles? AFAIK the Jet Airways codeshares no longer earn status miles for AC. Wouldn't any BRU-Canada flights earn more miles than a LHR-Canada flight?

EDIT: Never mind about b) I misread about flying Jet all the way to Canada. Could you not transfer to the AC flight at BRU? If you make a voluntary change days prior to your departure, your chance at getting AC status miles is probably 0.