The article (for which I can't give a link) has some interesting statistics.
3.4% of AF patients are on NOACs - NICE expected it to be 20% by now. This is believed to be due to doctors not discussing this option with patients.
25% of AF patients admitted to hospital after a stroke are on no medication at all
38% of AF patients admitted to hospital after a stroke are on aspirin
Aspirin reduces stroke risk by 19% and warfarin reduces stroke risk by 64%
There are 7100 preventable AF related strokes each year in the UK
These figures are from a report made to Parliament 2 weeks ago and quotes a Professor Cowie of Imperial College. The report also says that many doctors are more wary of the side effects of anticoagulants than of the risk of stroke. It will be interesting to see whether the imminent NICE report has the same figures.