The table result was 5S-2. Director was called at the end of the hand, and the facts as shown in the diagram were agreed. The actual E-W agreement is that 3C shows the red suits, so South was misinformed.
South stated he bid 5S because he was expecting club shortage in partner's hand. Polling two players of roughly equivalent standard to South, you find out both would have doubled 5C on the correct information, with 5S deserving consideration. Given the information provided at the table, both said there is a bit more reason to bid 5S, but would still double.
How do you rule?