Heathrow change in terminal flight UK Border control check?

I am traveling from NYC to Mumbai via London. Assume my connecting flight belongs to different terminal. If I have to change terminal at Heathrow, do I need to go through UK Border control ?

Best Answer

You may need cross the border control. As per https://www.gov.uk/check-uk-visa

Below is the excerpt

Will you pass through UK border control?

You always pass through border control if you:

leave the main airport building for any reason
need to collect your bags and check them in to your onward flight

You must also pass through border control if both:

your onward flight leaves on a different calendar day to when you arrive
there’s nowhere for you to stay overnight in the airport, for
example in a transit hotel

Check with your airline if you’re not sure if you’ll pass through border control.

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Do you have to go through security when changing terminals at Heathrow?

Just follow the purple connections signs which clearly point you in the direction of the departure lounge or buses if you are travelling from a new terminal. Be warned: everyone who boards a new flight at Heathrow will have to go through security.

Do you have to go through passport control on connecting flights Heathrow?

You don't need to go through passport control at LHR for flight connections.

Do you go through border control on connecting flight?

Transit Security vs. Customs. In almost all cases, if your bags are checked through to your final destination and you already have your onward boarding pass, you'll go through transit security when you land at your connecting airport instead of customs.

Do you have to go through security if you change terminals?

If you are connecting from one flight to the next on the same airline, you may remain behind security. Your connecting flight will be in the same terminal. If you are connecting to a flight on another airline, you may have to change terminals.

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