Heathrow takeoff routes - variations?
I live quite close to the northern half of the Heathrow 27 takeoff routes (near Slough), where departing traffic usually follows quite a predictable path, northward toward Wycombe or northeast over Watford, turning at Burnham.
Last night about 1800, three departures all turned right much earlier than normal, looking at Casper they started turning almost over the QM reservoir.
Just wondering why this was.. pure idle curiosity. Something nasty on the weather radar perhaps? Didn't seem to affect any other traffic before and after.