My daughter is flying to Heathrow next week on American. She needs to meet up with her professor and another student who are arriving within an hour of each other (hopefully) coming in on British Air and United.

Can anyone come up with a failproof (Ha!) central place to meet, and possibly a backup plan of where to leave messages?

My backup will be for all to buy phone cards and call me and I'll guide them, but I have no idea what might be central etc. once you come out of International arrivals and possibly in different locations.

Thanks.