Originally Posted by Dino55

Please are there any additional checks / screening for passangers who are transferring from an EU flight to an US-bound flight at LHR? Except the security screening as requested by the UK government.
The boarding pass will be issued before the first leg to LHR on the whole itinerary (all flights are under the same itinerary with one reservation number). The ESTA check should be done before the first leg at the first departure city (in EU).
Thank you.

Originally Posted by jrms

You will go through security screening during the Flight Connection process after arriving at Heathrow and before going to your US-bound flight’s gate.