On a famil trip with Virgin returning to LHR from JNB, we had been kept low almost the whole length of Africa due to traffic and the rudimentary ATC system which was in place (not a criticism, just a fact). The skipper was constantly assessing the fuel situation and coming over Europe it looked like we would make it with enough in reserve. However, the crew were also monitoring the LHR weather and in touch with Virgin Ops who were reporting 20+ minutes holding due to Low Vis Procedures (FG at LHR).
So we diverted in to Paris Orly for fuel ... then picked up 3 hours on the ground waiting for a slot back in to LHR.
The point of the tale ?? The long haul crew on my flight made all the right calls and didn't press on or push the limits, even although it would cause them and their passengers some inconvenience. Presumably the crew in this thread also made their decisions based on the information available to them, which none of us have at our fingertips right now.