Witch seats

Which Witch?

Four witches in coats sat in four facing seats
They were travelling by virgin express
Two were by the window and two by the door
The arrangement was strange as you guessed.

The east witch sat on Madge's left
Norma had a coat coloured blue
The green dressed witch was to the west one's right
And Oprah was the only luminous witch.

Phoebe was across from the north witch
The south witch in black had a cat at her throat
The east witch stared out of the window on her left
But which was the witch in the red coloured coat?