Vernon Kay and unreliable tour guide Paul Gorton test Nitin Ganatra, Rev Kate Bottley and Gladiator Apollo on their knowledge of the UK. Today's tour is of Derry/Londonderry.

Celebrity players Nitin Ganatra, the Rev Kate Bottley and Alex Gray, aka Apollo from Gladiators, face another knowledge battle, led by Vernon Kay and aided by unreliable tour guide Paul Gorton. It's the halfway point, and the gloves are off for today's destination, Falkirk.