Re: Skills shortage is at the hiring end.
Unless you've passed retiring age, you're NEVER too old, & probably not then either :)
Quiz list for you to answer, here, or to yourself.
Where do you live ?
Are you prepared to travel as far as 200 miles, or further for a role ?
Are you prepared to stay away for 1 week, 2 weeks, or 4 weeks as required ?
Will you accept short term, i.e. 1 month, 3 months, or 6 months long contracts ?
If the answer to those is yes, then put your CV on Jobserve, & Jobsite, and create a Linked-In profile.
Start applying for jobs, don't use the bulk apply, don't bother with cover letters.
There is plenty of stuff out there, this week I have had a dozen or so roles offered, with the stand-out one paying 380GBP per day, and on my home doorstep.