How To Address A Judge

[fruitsalad]

I want to write a character reference, to a Judge how do I address him/her if I don't know their name. Thank you in advance

[Ranjit]

Judges should be addressed as Your Honour.

[Cloverjo]

Depends on the court in which he or she sits. See here.
https://www.judiciary.gov.uk/you-and-the-judiciary/what-do-i-call-judge/

[Old_Geezer]

"'er you ! You with the comedy wig !"