Gwynfor Evans

Driver Gwyn Ivor Evans was a soldier in the British Army. He took part in the fight against the Great Intelligence and its robot Yeti in the London Underground. Evans was a member of Colonel Lethbridge Stewart's team. He was the only survivor other than the Colonel of a fight with the Yeti. Evans wanted to desert the Army, but the exit gate was locked. Evans always sang when scared. (TV: The Web of Fear)

Behind the scenes
Driver Evans' full name is revealed in the novelisation of Downtime.