The problem for Brand is that he comes across like any member of the public would when put on QT ie. overly emotional and a bit panicky. The rest of the panel have experience in this kind of situation so come across better. Usually when a non-politician go on they get more leeway than the politicians but I think because he's been putting himself about politically he wasn't given that. Maybe he gets better with practice, idk. Huge fan of Camilla Cavendish talking up the meritocracy of the City while railing against immigrants though.
Also, the public in Canterbury are fucking morons.