Matchpoints; Lead 5♣
SB was quick to claim possible UI last Tuesday at the North London club. West, ChCh, asked before leading whether North's 4C and South's 4D were first or second-round controls and South, SB, replied that they bid either first or second, Italian style, up the line.
West led a club, which ran to the jack and declarer ran the queen of spades losing to the king. East switched to the jack of hearts and declarer was one down.
"DIRECTOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOR", summoned SB and the whole room turned to see what the matter was, as it seemed like someone had been taken ill. The TD came running. "East selected from two LAs one demonstrably suggested by the UI of West asking whether 4C and 4D were first or second-round controls," SB began. "If West had possessed the ace or king of diamonds, he would not have needed to ask about 4♦, as South was known not to have a shortage from the 3S rebid. East should therefore have selected a diamond fatally. In addition, I am also seeking a PP against East for blatant use of UI and West for illegal communication."
SB turned on East, RR, quite nastily: "If I had known you were going to cheat, I would have risen with the ace of spades and tried three more rounds of clubs."
RR responded: "I switched to a heart as I remembered you had cue bid diamonds; for no other reason; there was nothing else to go on".
How do you rule?