Originally Posted by
ChampagneSocialist
1) At HKT check-in, I would be getting boarding passes for both segments (HKT-BKK and BKK-LHR) despite being on separate tickets, yes?
Yes
Originally Posted by
ChampagneSocialist
2) In case of IRROPs and I miss the BKK-LHR segment, would TG cover me?
Most likely yes (but no guarantee). Most likely the TG check-in agent will link your reservations when you check-in at HKT.
I would book this itinerary without hesitation.