Heathcare sector in the UK
I do work in UK healthcare IT - and have done for 15 years. I have no formal IT qualifications just clinical ones.
UK healthcare IT
1. Is totally dominated by one utterly ignorant, imbecilic and fickle customer - the NHS (or in fact the DoH)
2. The money is cr@p unless you can get on the increasingly elusive consultancy circuit. Gone are the heady days of Nu Labour and management consultancies throwing zillions at morons.
However that doesn't mean you shouldn't try this sector given your background.
Robet Helpman makes an excellent point. Domain knowledge is helpful and even valued by most sensible IT companies.
Also IT work is not restricted to taking a monkey wrench to hardware and cutting code. Good systems analysts, people who can read and write functional specs and documentation, trainers etc AND have worked in the industry the software is being supplied to are few. If you set out on that path you may find yorself with plenty of choice of work in this sector - but as I said - don't plan on retiring to the Caribbean at 35.
And don't kid yourself it's an escape from the NHS. If you work for a supplier to the NHS - you'll still be at the sharp end of the Political BS.