Career advice for over paid middle aged person?

So, I earn £60k. Don’t love my job and am bored. I’ve done a bit of everything at a senior level, but am not qualified for anything specific and don’t have a degree etc.

I’ve worked in healthcare for 25 years, have a clinical background and need to earn £60k minimum as my wife won’t work and I have lots of children.

What can a hard working, very experienced but unqualified middle aged man do, or do I just keep plugging away for 25 years and hope to die before retirement for that sweet death in service benefit!