Only just spotted this after two days... guess we've all been a little bit busy with this little disruption called "Christmas".
What do I do in the lounge? Probably the same as everybody else... check my email, have a bit to eat and/or a drink. When I have a longer wait I might do some work, or catch up with some personal correspondence. Sometimes, when I don't feel like working, I might read a book.
One single improvement I'd like to see? A lounge closer to the UK departure gates (like we used to have)