Think the BS100 was a lot bigger, and most definitely a hot front, which of course runs straight into some of the snags of the F-35B by a different route, + hot gas re-ingestion in a big way.
I mentioned this to an RN Engineering Officer who somehow contacted me asking 'if PCB had ever been thought of'.
When I described this he was amazed, and on relaying it reported back that even his instructors had never heard of it - depressing !
Photo's from 'Harrier' by Bill Gunston.