South called me to the table where it was clear that West had faced an opening lead and North had spread dummy correctly on the table (N / S experienced; E / W inexperienced; Duplicate Pairs).
All players agreed that:
i) North should have been declarer, not South;
ii) North and South had conducted a long complicated auction, E / W passing throughout without any q's;
iii) at the end of the auction N said to W "...you to lead."
iv) none of the players noticed the mistake in that statement so W selected a lead face down, asked E "any q's" - none - so W faced the lead followed by N spreading his hand on the table as dummy;
v) S now woke up to the fact N was presumed declarer and called for TD.
I explained and applied law 47E1 allowing W to retract the lead; asked N to pick up their hand; restored the lead to E; N to be declarer, S dummy.
South and North were unhappy, arguing that this was not equitable. They asserted that all the players had gone along with the incorrect actions and that E / W would now be in a position to know exactly the position regarding finesses, potential ruffs and forcing plays. Surely the board should be cancelled and average scores given?
I thought not and asked them to play the board. Was I right please?