I am traveling from India (New Delhi) to Helsinki with a connecting flight at Heathrow, UK holding a resident visa for Finland. Unfortunately without prior knowledge I went and purchased two different tickets from two different airlines.
My first leg is with AirIndia reaches Heathrow terminal 2 at 7:30 AM and my second leg flight with Finnair from same terminal at 10:20 AM, resulting into max available time between flights is 2 hours 50 mins.
Since both tickets are from different and not partner airlines, I might end up cross UK border to claim my baggage followed by recheck-in/immigration/customs check.
Would like to know if ~2h50 is sufficient for entire recheck-in/immigration/customs process? Any possibility where I can save time in the process?