I'm arriving into LHR from JER on BA1341 on Sunday 1st September, and departing to LAX on BA281. I only have 1 hour and 20 minutes to connect, so it's a bit tight, but sitting in Row 2. Which T5 terminal will I be arriving into and departing from? And can someone tell me if Row 1 is actually occupied? It's been blocked off since I booked the tickets, I think. Thank you!

If JER is very late taking off, it's going to have a knock on for me as I have a connecting AA flight in LAX and then a separate flight the next day! I know BA will make it right, but it's just a pain! I don't think it will be too bad, as the summer holidays are pretty much over now and everyone is getting ready for school!