I was at EGLL, and other AI aircraft were being told to taxi to 9L, the active runway and I was told to taxi to 27R, the opposite end of the same runway. Any idea why?

This happens when either you or FSMeteo changes the wind direction after you have first loaded your flight. I recommend reloading AI traffic after starting FSMeteo (e.g. by not having AI enabled when you first load your situation and then enabling it again once you have loaded FSMeteo).Misha