I really enjoyed this too. I'd finished the grid and got the theme etc. but couldn't get one answer in the top right corner. I then remembered the alternate spelling of one word, and finally got there.
As a newbie to the EVs I would appreciate a nudge! I have a completed grid much to my surprise but simply cannot figure out the perimeter! Could some kind soul give me perhaps the first couple of words and put me out of my misery?
Brendan, this crossword, Enigmatic Variations, is the thematic puzzle in the Sunday Telegraph. It appears alongside the weekly cryptic and general knowledge crosswords. I think you have to be a subscriber to get it online.