This time, there was fog at Heathrow and we ended up having to divert to Cardiff to get more fuel... where refuelling ended up taking over 2 hours. On the face of it, this could easily have been a bad experience in which I suppose I could have sat there thinking of ways to blame United. What redeemed it for me was United's Channel 9, which lets you listen to the cockpit's conversations with Air Traffic control. This is a feature which is, I think, unique to United.

Wow, thats really cool.