Double of 2♣ would have shown clubs, this is an undiscussed situation, I was west and thought this had to be strong balanced, but I had no idea if 3♥ was a transfer (and if partner would assume I was strong bal).
I therefore alerted 3♥ as I believe you're supposed to in EBUland and said when asked "Undiscussed, might not be natural" which gave UI to my partner. I bid 3♠ on my 3244.
Since this is an offer to play 3♠ whether I'm accepting the transfer or bidding a suit of my own, I don't believe either meaning is alertable, so I have no UI when partner doesn't alert.
Partner now has 3 bids he can make, he's 3613, so 3N, 4♥, and 4♠ are in the frame. He also knows this is an undiscussed situation.
3N runs the obvious risk that I bid 4♠ on 3, 4♠ could be silly, 4♥ is safe because if I took 3♥ as a transfer he'd be showing a mild slam try 5-5 in the majors by our methods and with that hand he'd have made a 2 suited overcall over 1N.
He chose 3N and having no UI myself I opted to pass as I wasn't sure which major he had. This worked well in practice, but I'm not sure if anything would have happened if the director was called.
My questions are:
1. If the director was called, does he do anything ?
2. Partner basically knows that this is an undiscussed situation, does the UI tell him any more than this ? Can he choose 4♥ from among the alternatives because it makes the situation clear ?