Someone said STN and LTN were closed? Why? They are both Cat III so unless it is below 75m/ 0 ft they should still be open?
Before the non-IFR pilots/ non-pilots start their own rumours, can I just say that if there is a decrease in the weather below Cat I, the tower would pass the new RVRs to the crew whilst on approach. Every time it changes they are passed. If you are Cat I, doing a Cat I approach and it goes below minimums you go-around. The 1520z weather is Cat 1, with an obvious downward trend, by 1550z it is Cat III on runway 15 and Cat 2 on runway 33.
I am sure the full AAIB report will give us the facts.