But would you be "constantly thrown about"? In my experience, you get above the boundary layer and it's smooth enough. I accept that terrain can change that.
It was the situation over the southern uplands and lake district I was thinking of, and from experience of upper winds way less than 55kts. In any case the forecast had 800fpm mountain wave in it.
Well, how do you normally depart southbound IFR from PH? Why would that be difficult today?
There are very few light single IFR airways departures out of Edinburgh. I don't have an IR only an IMC but any IFR departures I've done have been VFR to West Linton then climbing IFR to Talla.
NS