Are you sure you have connected to the official wi-fi from the airport? Such public places are ideal for what is called an
evil twin attack, and if you were connected to such a fake network and logged in to your e-mail or any other service, all your data fell into the hands of hackers.
First thing I checked was the portal, where I put my credentials. So I went back to my browser history and this was the URL : portal.live.virginwifi.com
I couldn't access it, shows error 500, i guess because Im not connected to the AP. The details I used to connect where random. Something like test/test etc. I didnt use my real info.
The ssid I connected was : _stanstedairport_WiFi. I have already contacted the airport and I gave them the SSID, in case it was a fake SSID