Watching Casualty last night I was surprised to see Annette Badland! Don't worry she doens't fart in this episode, and there are no sign of any zips!!
Annette Badland played the recurring villain Blon Fel-Fotch Pasameer-Day Slitheen a.k.a "Margaret Blaine" in the 2005 series of Doctor Who.
Wikipedia - Annette Badland:
Watch the Casualty episode here...
Casualty - Series 24 - 10. Every Breath You Take
The episode also stars Cush Jumbo who played Lois Habiba in Torchwood: Children of Earth.