Ahh yes I had read about this ex-eu fare, fro my understanding because of of our ridiculous PAX tax it's cheaper to book and fly from say Lisbon to YYC in club or WT+
The only part I don't understand is how it quite works? I.e say I want to go to YYC. Would I book CDG to YYC return then book a separate ticket from LHR-CDG?