MOR, a good friend of mine who is cabin crew & fly's for British Airways, has told me that this week, a BA 146/RJ100 flight has had a major problem enroute BHX-STR-BHX with 60 passengers unconcious on the return flight. It appears that there was a problem with the airconditioning on the out bound flight which became worse on the return flight inbound to BHX.