//...and who do you think you are? some retired old codger no doubt?//
I'm neither, actually, but that's besides the point.
// The work I do, requires certification and an education to PHd level. Certification which is no longer recognised now the UK is out of the EU.//
Why on Earth would you want to work somewhere where your qualifications are not recognised or respected? The petulance of the EU over our leaving their club is one very good reason to give them a wide berth. Their loss, I would imagine from what you say.