Thanks so much for this guide… and people who have commented for extra tips like the battery strips!
Phone booted up perfectly and everything seems to be working. Thrilled that I should have some extra time with my phone before having to get a new one.
All in spent around £10 - Took me about 2 hours to do but I’ve never done anything like this before and some things took me a bit longer to figure out. (I only got one adhesive strip though there are two in there, one seems to be holding okay though.)
I wrote some additional comments for the steps here to help anyone who like me is new to this. (Wasn’t enough characters to do it here.)