I believe west end shows, in general, have high turnover. When they have cast changes it’s not just for principals but for the whole cast at times. So ensemble dancers on the west end are always moving from one show to the next. Whereas, in the U.S. and on broadway chorus contracts make it easier for folks to stay with one show for longer periods of time.
My father (AIDS)
My sister (AIDS)
My uncle and my cousin and her best friend (AIDS, AIDS, AIDS)
The gays and the straights
And the white and the spades