I think having an answer like 1a in an Everyman definitely takes it to a slightly tougher level than usual. This took me as long as yesterday's prize and I think I reverted to this forum more than I did yesterday. The old dilemma again whether an Everyman should be an easier entry level solve but I really enjoyed this. Some cheeky misdirection and I loved 5d. I think the three theme is definitely significant. Looking forward to the next 300.
Thanks Crosbie - going back to look at 5d again, I realised I'd got the last letter wrong, which is why I didn't understand the answer! (And why I was thinking of Monty Python's Four Yorkshiremen!)