Thanks White Knight, finally someone has called a spade a spade.....
Come on guys its NOT that complicated..and yet why oh why do some choose to try to over-complicate a pretty bloody simple concept??
Fer fecks sake, we usually carry fuel for MCT anyway when its foggy..we operate to a 2 runway airport..theres another runway a couple of miles away..plus another..then another..

why all the ball-ache with committing to destination?
Sheeessh, anyone would think half of you get pucker twitch operating to Europe when theres a bit of fog or ice around..oh hang on a minute..you do!
FWIW, committing to destination has been around for a looooong time..its how things work in the London TMA fer fecks sake
What would I know though, I'm a lowly F/O with no EK command exp