Tarovian martial arts

Nardole studied Tarovian martial arts for "a while". He eventually reached the rank of "Brown Tabard". He also learned the Tarovian neck pinch. However, he could only perform it with his original right hand and not with his left hand, which he had in fact won gambling. (TV: The Lie of the Land)

Nardole used his Tarovian martial arts skills in order to kick down a door in Edinburgh, 1645, (PROSE: Plague City) and specifically used the neck pinch to knock out a soldier named Alan, whose mind had been infiltrated by the Monks. (TV: The Lie of the Land)