So, thankfully I’ve had some quiet days with the chap pushing content to me, but had carried out a couple of hours work when i noticed that a lot of things were not working anymore. The search functionality, the hamburger on mobile view etc. I narrowed it down to me upgrading the project to bootstrap 5. What a pain in the backside.
Thankfully i was able to pull a back up from a few days earlier before i upgraded and only took me a few more hours to put right.
Lesson…… dont upgrade to bootstrap 5 (at least not for a long time)