We are traveling from the United States to Florence via LHR. We are on one ticket (not two separate ones) and we will arrive in Terminal 3 and Depart from Terminal 5.
I am confused about the ETA that the UK requires. I have read that if we are connecting to another flight we do not have to have the ETA. Is this correct?
I just want to be sure because I think when we arrive at Terminal 3 we will have to somehow get to Terminal 5 and I am unsure about that as well. We only have 1 hr 50 minutes and I don't want to mess up.
Thank you for your help.