Well Flashy
I try not to post crap - but ..........that is in the opinion of the reader!
From my instructional days
generally throughout the industry 33 is regarded as the upper limit?
Only because the old grey stops absorbing as quickly - and it is a generalisation & therefore doesn't apply everywhere!
Thanks for the confirmation of the first sift.
As you say
Best of British. (not french!!)
Ps Haven't got my atlas handy - is your lat & long XRY
pm the answer