The 27th is definitely a no can do from us, I'd like to try to get this done before Tuesday because after that everyone's pretty much gone. I'd also rather this not devolve into a game of strategically picking nonoptimal times for the other clan.
2:00 PM GMT is not doable since that's 7 AM PST/California time and we need to work/go to school during the day. We may be able to arrange it a tad earlier or later into the day, but not too much earlier or most of us won't be home yet.