Lead: ♣K
Table result: 4♥+1 (N/S +450)
N's 3♣ was after substantial BIT (sorry, I haven't managed to highlight / tag it in the auction box). It was alerted by S and explained by him before E's 4♣ as "Unassuming Cue Bid; shows good raise in Diamonds" (later qualified to "shows Diamond support"). E raised the BIT at this point and it was agreed at the time. No further information is available on N/S's methods (standard scruffy small SC).
E expressed reservations about the N/S auction both after the final pass (before opening lead) and after dummy went down. S then said that N's new suit at the 4 level was clearly showing 6 or so cards.
This may or may not be referred by E/W's team captain for a formal ruling (there appeared to be no effective ruling mechanism in place at the time, and the match result is not substantially affected by the outcome). I'd nevertheless appreciate the forum's views.
PeterAlan