The bus timetable wasn't even disturbed, the trains still ran exactly to time, yet we get a light dusting and the world comes to an end.
No, it's only the South-East that comes to an end. My train from Manchester this morning was on time until about Wembly, then lost ten minutes from there into Euston. London in general came to a stop for less snow than I happily walked to school through when I were a lad and we had real winters.
I agree that UK needs multiple hubs. Even now, and in good weather, it can be quicker to get into the air from central London through BHX than through LHR when you take travel time and time through security, etc. into account. Who needs to wait five or more years for runway 3 and T6?