Well something quite interesting, if you’re ever at Heathrow terminal 5 and want free wifi, you can log onto the British Airways wifi using the password: budapest (this password was working on 25th April 2013). Apparently this changes from time to time, and to get the new password you can see it on the screens in the “Lancaster Room” (opposite gate A3)
Hope this helps ?
P.S this post was done using the wifi ? for a nice cozy spot, sit at Starbucks ?