Thanks
trying to digest this!
There are to my knowledge one self signed and expired certs for watchetwebdesign.co.uk but the mariners is up to date. i have used certbot to change all fo my domains to https with no problem at all - it is only this wordpress site with problems and I can not find why it is reproting this date. The .conf file for the domain is correct and updated by certbot to point to correct certificate.
the apachectl -S shows nothing wrong
I will try later to remove the wwdesign certs completely but someone else put there, so need to find dependancies before I do so
Your link is really useful so thanks for that
John