1pm to 9pm GMT +1
...Or in other words, 7AM to 3PM for me.
I'd complain about having to wake up so early, but that fits in almost perfectly with my 8-9AM class every tues/thurs for me. Plus, I guess I can drag my lazy ass out of bed early if it's for you guys.
By the way, I did a bit of playing with Roll20. Haven't quite got the hang of it yet, and any art assets have to be uploaded or bought. Here's a simple, primitive map I made this morning.