Many thanks for your good comments. We can tell them apart at the moment with a bit of thought ... and when in doubt, one has a big toe with nail varnish!
Just checking if anyone is still there - Am I right in thinking the names to be highlighted are hidden in an across clue numbered twice the sum of the appropriate down clue? Pulled that one out of my deer-stalker!
So, Devadolly, your question is just an expression of your mathematical prowess! Fail to see how you are at a loss now! Other than of course if you are waiting with bated breath for what sunday's EV has in store for us!