I entered UK with my Pakistani passport plus short term student visa valid till February 2019. I came to UK on the day I became Canadian citizen with proof of citizenship certificate and applied for my first Canadian passport from London. I’m planning on going to Europe from London and then I’ll be returning to London and going to Canada few days after. So I would like to know few things: 1) since there is no exit control at London Airport which passport should I use for check in and API information? 2) which passport should I use to re enter UK from Europe since my entry stamp is on Pakistani passport. 3) I’m travelling to Europe on Canadian since i don’t need a visa with that passport. So is it vice to tell this to immigration office Incase they ask me how did I enter Europe.
After reading posts I was planning to leave UK, showing Pakistani passport and entering API information of Canadian passport but then how will UK border find out I left. I can re enter on my Pakistani passport without any issue since ( I traveled to turkey from UK with Turkish visa on Pakistani passport last month) and didn’t even carry Canadian passport.
I would really appreciate your help. Thanks in advance