Personally I think the Queen of the interrupt and talk-over is Ophelia. She drives me nuts. One BA just stood there waiting to get a word in to do her job of describing the dress, but Ophelia never stopped ! she went on about the colour, where to wear it, the sizing, and I thought Jeezus whats the point of a BA when you cant shut up ! and even when the BA gets going, off she goes again, interrupting with yet another personal story.
I'm at the stage where if she is presenting I switch off, her continual "I luv it because........." just grinds on me.