TR, I defer to your direct dealings with Mr Holbrook. I can only refer to what was published because I was not in attendance at the time. I believe BB posted the summary to which I referred on the previous page, two posts before yours.
---------------------------------
Also in that summary is a reference to the RAF's rules about the limits for VFR flight. Despite what the summary stated, it was more normal (quite normal) to land if the minimum visibility rule could not be complied with, rather than make an emergency climb to SALT. A climb in cold weather would put any of the RAF SH helicopter types into known icing conditions, which was definitely not allowed because they were not equipped for that.