Twist Morgan was a friend of Manny's who lived in London. She only appears in one episode, and even then is only heard over the phone.
He's Leaving Home[]
It is unknown how exactly they know each other. One night, Manny came home late, having apparently had chips with Twist. The next day, she called Manny to tell him about something that had happened between her and someone. However, the call was intercepted and disconnected by Bernard. This, among others, was a direct contribution towards Manny's decision to leave.
Spaced[]
"Twist" is a clear reference to Twist Morgan, a regular character from Black Books' sister show Spaced.
There is a continuity error in Twist's appearance in Black Books, as Twist is stated to be thirty years old in Black Books, whereas she is in her early twenties in Spaced.