An interesting question to which I do not know the answer but I am aware that there is a growing trend in Europe for some airlines that an approach cannot even be commenced if the weather is below minimums and recently watched a Youtube video of a chap in a DA42 shooting an ILS into Linate who explained that he could only continue the approach beyond the outer marker because the weather was reported as above minimums. There is also plenty of statistical data that the risk of CFIT goes up on the second and subsequent approaches - getinitis rearing its ugly head.