Is there someone out there knowledgeable in health insurance matters?  
 
I have been a member of a company private insurance policy for over 20 years.  And until July 2024 I had never made a claim.
 
In August 2024 at the age of 58 I was diagnosed with advanced PC and given a 5 years average life expectancy.  I would now like to leave my company and enjoy a few years of my short(ened) retirement.  It is not essential but my preference would be to explore keeping private health insurance cover.  
 
My concern is that once I leave my existing company then my company health cover ceases.  So I’d have to find a new policy.  But more than likely I’d be uninsurable for pre-existing conditions… except at an eye watering expensive premium?
 
Is that correct?  For some reason I thought there was an obligation on insurers to offer insurance cover to “leavers” on broadly similar terms.  Am I mistaken? 
 
Tony