Thank you for your gentle words, Mr Knight.
DXB = 30 mins, more if wx bad. That is not very often.
LHR = 30 mins, 60 if forecast is bad. There is now way I'll ditch my alternate going into LHR. To get into that situation there would be major delays and I would not be comfortable to continue in the hold without diversion fuel. However, last time I had to hold for a long time, LON ATC asked all aircraft if they could hold for one hour. Yes = hold. No = Stanstead.
Then again, our commanders are authorized to carry the fuel we require, no questions asked.