I went to pick my parents up from Heathrow airport on the day they returned from Australia. They were due in about 5am and it is a 2 hour drive so I had a few hours sleep on the sofa before leaving home at 2am.
Armed with their flight details I stood in Arrivals and awaited their return. As soon as their flight showed as landed on the screens I looked out for them. A steady stream of passengers came through but there was no sign of my parents. Perhaps their baggage hadn't come round on the carousel? Perhaps the people coming through weren't from their flight?
I waited. And waited. And waited. People stopped coming through. Then their flight disappeared off the screen and then another plane load of passengers started to stream through, all reuniting with their families. By this point it was about 7am. Two hours after they were supposed to have landed. Hmmmm.
I went to the airline customer services desk and explained the situation. However, due to data protection the lady behind the desk couldn't tell me anything. I said that I'd driven two hours to get there, they hadn't arrived, I'd not heard from them, mum's mobile just went through to voicemail and I just wanted to know if they got on the flight. She reiterated that she couldn't give any information out. I told her that I could give any personal details about my parents that she needed to know to prove that I was who I said I was. All she said then was "I suggest if you come back at the same time tomorrow you may find your parents".
I was there a day early, exhausted from driving through the night and facing a longer drive home due to it now being morning rush hour. I rang my brother and told him the situation and he said just to come back home. So I did, fighting the tiredness. I went to bed for the day when I got in (which actually set me up well for a nightshift that night) and when I got up mid-afternoon I spoke to my brother again who had managed to get hold of our parents and had spoken to a very apologetic mum who admitted she'd given us the wrong day because it was a night flight and she'd given us the day they'd taken off and not the time they were due to land, which were two different days.
My brother then went back to Heathrow the following morning as I was unable to due to working a nightshift. Mum kindly reimbursed my petrol and parking expenses!