Ancelyn

Ancelyn ap Gwalchmai (anglicised: Ancelyn, son of Gawain) was Knight Commander of the Britons under King Arthur in a parallel world in which Arthur actually existed. His name suggests that he was of Welsh extraction. Ancelyn was a noble and honourable knight: though he initially dismissed Brigadier Winifred Bambera as a "peasant", he was able to accept her as an equal after she bested him in combat. He was unflinchingly loyal to his king and his king's fight against Mordred and Morgaine.

Ancelyn displayed at least one ability unusual amongst individuals native to the main timeline: he recognised the Doctor as Merlin, on sight, despite having never met that particular incarnation of the Doctor. He also knew of the Doctor's ability to regenerate and of the TARDIS' dimensionally-transcendent interior.

After Morgaine's defeat, Ancelyn returned to his home dimension.