Vendee -Not sure where you get your information on the Harriers being 'clapped out' ! A lot of the airframes had far fewer hours on them them than the Tornado fleet and in many ways were superior in terms of reliability and future potential.
I didn't mention Tornado because its like comparing one clapped out airframe to another. I know that some Harriers had much less hours on them than your average Tornado, mainly because they were much newer but I'm sure you know that airframe hours don't tell the whole story. I would imagine that the Harriers had a higher number of cycles.
I haven't had anything to do with Harrier since the GR3 but a colleague told me a couple of years ago that the airframes were very tired. I'm not saying that scrapping the Harrier was the correct decision though. It probably had more life in it than the Tornado.