Here, I hope, are the solutions. Fingers crossed!
A Llanymynech - this is a view from the right side of the green - you miss short or on either side at your peril!
B Ilkley
C Royal West Norfolk
D Fulford in York, which used to host the Benson and Hedges and other European Tour Events. I played there many times in the 80s and 90s always in early July and it was almost always the best conditioned course I would play all year. It is flat as a pancake, but very cleverly laid out. I think CA MacKenzie is credited with the design, although you will often see Alister's name given. I have done so myself, but I was wrong!
E I still haven't a clue. I don't think it's outside the UK, or even outside England, because I have not played continental European golf when the trees are bare, apart from a round a Cannes-Mougins when I didn't take a camera.
F It looks like Clitheroe to me. It's a very engaging parkland course in central Lancashire. You would never play it in preference to the famous coastal courses, but if you happened to be in the area it would be worth dropping by. The town of Clitheroe is very attractive with its ruined castle and an excellent independent wine merchant, Byrne's. A visit to their cellars is a must for any oenophile!
G Aberdovey, Cader hole - used to have a periscope. Does it still? Has anyone been there recently?
H Bramall Park - this a brute of a picture, for even if you know the course well, you are well out of position if you finish here! BP is one of those courses that is better than the sum of its parts. It's a 19th century club that had its course revamped by Alister MacKenzie but chose to have it made less demanding by Braid (I think). It's one of the better Manchester suburban courses and I enjoyed 5-day membership there back in the 80s when I worked for the BBC. I still have an affection for it.
I This is the 3rd at Thetford, a lovely course which seems to fly under GCA radar. There will be more photos from it.
J and K are Wallasey. A very good links, if not quite in the Ivy League.
L This is certainly Clitheroe.
M and N are the same hole at Ashburnham, a links course on the South Wales coast, although there are precious few sea views.
O Rungsted - Anders has identified it, thank goodness!
P Rungsted also - see the detective work of Anders in the preceding post.