Mike 6567
I lived on Bermuda for 12 years and visited often before and after. Bermuda is under two hours from a US diversion airport /airfield JFK being the nearest aside from Norfolk NAS which i understood would be dire emergency only being military.
Problem with BDA in winter was that it could be a very very long trip from London due to Atlantic winds forcing a very slow journey or massive diversion. One trip I made went as far north as iceland before heading south over Nova Scotia. Of course if it was more of a westerly wind a slow trip a cross the Atlantic arriving over a blocked runway meant more plodding against the wind to get to NY. I think these were problems for the BOAC VC10s and 707 436s but once the 747 and 1011 arrived things improved.
If you did face a blocked runway the USN based at the airport (a USN base itself) had some serious equipment for lifting /shoving ?dragging anything out of the way so you would probably have been Ok