2NT wasn't alerted at the time, however when 3NT was taken out to 4♦ West did alert as showing both minor suits. South had passed so I asked South if he wanted to change his pass (which was declined). I also tried to explain the problem to East (probably wrongly ) about taking advantage of UI and asked to be called back if NS were damaged.
5♠* went off 2 only and South explained that since he felt 5♦ would make (it is unbeatable), he would sacrifice at the favourable vulnerability. (5♠ can go 4 off on correct defence but that is probably irrelevant).
I am polling the East hand on Bridgewinners - the problem is that the players there are much better than the East at the table (with all due respect to her).
Assuming that the 4♦ call is disallowed (one of the better players in the club felt that 3NT should be passed), should NS be awarded the score for 3NT - 3 (which is what would almost certainly happen - as North has 6 spades and an outside Ace, the Spade would be led, killing West's K8, or should they keep the 5♠* - 2 (even though it was a relatively successful call)