Tartan

Liz with Dr O'Kane's blanket behind her. (HOMEVID: The Zero Imperative)

Tartan was a type of pattern, famously linked to Scotland

The Sixth Doctor's coat featured patches of red tartan. (TV: The Twin Dilemma)

For a while, the Seventh Doctor wore a crimson and black tartan scarf. (TV: Time and the Rani)

Jeremiah O'Kane owned a tartan blanket. (HOMEVID: The Zero Imperative)