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I know this has been asked multiple times, but I am unable to get answer for my case for transiting through London - Heathrow International (LHR). I am not sure if, I would be crossing the border control as mentioned on their official site. I also checked with Finnair and they are also not sure.
I read at lot of places that terminal is closed at night so you need to get out, I don't see any official information related to this.
Also I don't plan to leave the airport, I would just to be inside till the next flight. I am mostly concerned about the return flight where there is an overnight layover.
I seem to fulfill all the transit visa exemption criteria except below one, where I feel ambiguity in second part, does it mean same day before midnight or next day before midnight.
"have a confirmed onward flight that leaves on the day you arrive or before midnight on the day after you arrive" 1
Origin: Canada / Destination: India
Arrives: 06:25am (day1) - T5 / layover: ~04h / Departs: 10:20am (day1) - T3
Origin: India / Destination: Canada
Arrives: 20:40pm (day1) - T3 / layover: ~15h / Departs: 11:40am (day2) - T5
Added more details: - So I believe I don't need a transit visa. Thanks folks for your help.
Transiting without a visa
You might be eligible for ‘transit without visa’ if:
o you arrive and depart by air Yes
o have a confirmed onward flight that leaves on the day you arrive or before midnight on the day after you arrive Yes
o have the right documents for your destination (eg a visa for that country) Yes
One of the following must also apply:
o you’re travelling to (or on part of a reasonable journey to) Australia, Canada, New Zealand or the USA and have a valid visa for that country Yes