Waiting for a late night/early morning train go to the Costa in the station its warm, open 24 hours and has wifi.
Need water? Go to M&S. They sell it for less than 50p for a large bottle. Cheapest in the station by far...
Looking for the toilet? You'll find them in the following places:- Opposite Eurostar arrivals- The Circle- International departure lounge- Platforms A and B (beyond ticket barrier)
Plug sockets outside costa and monsoon which I'd handy if you have an iPhone that likes to drink the battery life like water.
