In the fourth match of the Christmas series for grown-ups, the Nottingham team, with explorer Levison Wood and ecologist Helen Roy, fight it out against the Sheffield team, which features news presenter Kylie Pentelow and Daily Telegraph columnist Michael Deacon. Jeremy Paxman asks the questions.

It's the penultimate match of the first round in the Christmas quiz for grown-ups and both teams are doing battle for a place in the semi-finals.

They are the University of Durham, with weather presenter Sarah Keith-Lucas and comedian Ed Gamble, who are playing against Downing College, Cambridge, with the BBC's media editor, Amol Rajan, and their global trade correspondent, Dharshini David.

Jeremy Paxman asks the questions.