Dave,
It is compulsory to tell the truth during a trial.

Politicians' careers suffer when they are caught lying.
No actual lies have been exposed from that debate to my knowledge.
Are you aware of any?
(Not the bus statement please. We all now know how that has been justified, if not to everyone's satisfaction. Any others?)

DMcG
Actually there is, if a candidate breached the rules.

No-one breached any referendum rules.