Originally Posted by
missypoo
when we land at Heathrow, do we have to go through customs there or wait until we get to Rome 6 hours later? We arrive at terminal 5, so - will we stay at Terminal 5?
Yes, the BA flight from SEA arrives at T5 and your FCO flight leaves from T5 as well.
You will need to go through security, but will not cross the UK border. Your bags will be checked through to Rome. Just follow flight connections in T5.
Originally Posted by
missypoo
We have two hours between our landing and the time our flight leaves for Rome. Is that enough time?
Yes, that will be fine and if all goes well you should get some time in the lounge at LHR.