Mim was first mentioned in a episode dated 6 August 2015, when Pam called her to talk about Les Coker's affair.
An note in the following episode 7 August 2015 left by Pam said she was going to Mim's, Paul Coker referred to her as Auntie Mim and that her leg might be playing up again.
In a episode dated 26 October 2015 Les mentions Mim has a Bungalow in Worthing, he states that its horrible, dingy, messy and the roof always leaks.
Mim was previous an unseen character and had not appeared on screen. She first appeared for her Nephew Paul Coker's funeral.