I don't think we've seen Paul set the Prize for quite a while, so it was a pleasant surprise to have him set this one.
There is a partial theme (or maybe a bigger one, I'm notoriously bad at spotting these things). Actually, the more I look at it the less think it even constitutes a theme at all, partial or otherwise.
In terms of difficulty I'd say I found it quite hard in places, bu then I nearly always do. In fact, there are still a few I haven't fully parsed... or at all!
COD: I quite liked 1a, so I'll pick that:-)
Thanks to Paul for a challenging but enjoyable puzzle that gives us a chance to go down memory lane.
Let us know how you got on. Are you a fan of the theme?
Useless information - the host lives about 5 minutes down the road from me:-)