b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Rup Slitheen - General Asquith [Exp.] 9D [Type] Ref [In-joke] 
Unnamed, this Slitheen was called Rup because the actor playing Asquith is Rupert Vansittart.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke