During an election campaign they are meant to be extra careful not to be biased as well, they certainly failed there with the Momentum rent-a-mob, probably from London rather than Peterborough.
How WanChaiMiller can say the QT audience are Brexit supporters I'll never know.
I confess that I didn't watch either programme, but are you sure that you are not simply seeing bias that isn't there?
Farage takes extreme positions and provokes extreme reactions. It's unsurprising that an audience is going to be vociferous in response to him. Even an audience that is only 39% Remain is likely to be quite loud when he speaks.