Can you leave the departure lounge and then go back in?
Slightly unusual scenario. I'm arriving into LHR at 12pm (assuming flight is on time) and then have a flight from LHR at 6pm.
Can I check-in my luggage at First Wing and go to the F Lounge to work from 12pm but then leave at around 4pm to meet some elderly/disabled family travelling with me on the 6pm flight, so that I can help them with their luggage and check-in (I know we can't use the First Wing / F lounge as I can only guest one person; that is fine)?