From what I've heard from 'light blue' sources, including some who actually work as ground crew on them, the airframes are coming to the end of thier useful lives. One friend who was a 'groundie' on these for many years said he'd
never consider flying in one as he knew how tatty and aged they're getting despite external appearances.
If we 'kept' them, it'd have to be the AV-8B Harrier II variant built for the USMC in the USA by McDonnell-Douglas under licence (and also flown by the Spanish and Italian navies) and there just isn't the money since 'we' spent everything on the useless bloody Typhoon instead...
The USMC has already upgraded theirs twice in the lifetime of our Harriers which have had avionics and other upgrades including those incorporated in the 'Improved Harrier-Harrier II Programme' but remain essentially the same aircraft as they were nearly 30 years ago.
The last airframes were delivered to the USMC in December 2003. None have been built since then.
Also there's no real need for it's VSTOL capability. It's vertical take-off capability has never been used in Combat...
ever.
The RAF is leaning hard towards UAV drone capability for CAS missions as a Predator-type UAV can do everything a Harrier can do at a fraction of the cost and at at zero risk to the crew.
In the Gulf war the USMC lost 60% more Harriers to SAMs than other types as the heat-signature of the Pegasus engine cannot be effectively masked - also the built-in 'redundancy' enjoyed by more modern aircraft is sadly lacking in the Harrier - if you hit it hard with a cricket-bat you'll pretty much kill it.
Also it's expensive - expensive to run and expensive to maintain compared to other aircraft.
It's time to roll the credits on this one.
I
love watching them, same as I love watching Hawker Typhoons, Tempests, Supermarine Spitfires. E.E. Lightnings and Hawker Hunters.
I wouldn't
really want them flying CAS for me though...