West led the two of diamonds. After some thought declarer played the jack of diamonds from dummy and East followed slowly with the eight of diamonds.
Declarer won the trick in dummy and ruffed a spade, East playing the ace of spades. He now played five rounds of trumps, pitching two spades, two diamonds and one club.
He then cashed the ace of diamonds and tried to cross to dummy using the queen of clubs through the 'known' ace that West must have for his double.
Declarer claimed that the double is clearly based on unauthorised information from the hesitation over the opening bid. Further that the double has caused him to misplay the hand. It was also suggested that the opening lead could also be based on UI from the pass (doubling with no tricks and then choosing a 'tricky' lead).
On the other hand, declarer has played the hand very poorly. Pitching the third club from dummy is not necessary and not doing so would have saved the day (as declarer should lead the king of clubs from hand rather than trying to cross to the queen). Also if you are going to rely on the ace of clubs to be well placed, then winning the diamond lead in hand seems very clear too.
How do you rule?
I was kibitzing, not playing, a practice match for the European Championships. The players at this table were international trialists, luckily not the teams, but they would all describe themselves as experts and expect to be 'dealt' with as if playing at a major international championship.

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West North East South
3♦ Pass(H) 6♥
Dbl All pass
Agreed hesitation prior to East's first pass.