When the female judge is speaking to Kate she exposes her face by partially removing her false beard from her right side of her face which exposes her face to everyone in the courtroom however no-one reacts to the judge being a woman. It wouldn't have gone unnoticed as her face was easily seen removing her false beard in that way.
This is a gag done as a nod to the character that she played in Black Adder II: Bells (Kate/Bob).
This is a gag done as a nod to the character that she played in Black Adder II: Bells (Kate/Bob).