That's very nice of you to say, angels, and yes, everyone has been so helpful - all my questions were answered and any anxieties I had about the flight for my partner have gone!
We both can't wait for the trip. I grew up in the UK, but this will be only the second trip there for her. She absolutely adored it last time and hope this will be the same. This time it's the London area for a couple of days, Snowdonia, across to Dublin and then the southern coast of Ireland before it's back to the UK and Oxford before returning to the west London area (where I grew up and my old Mum still lives!).
I will try and remember to post a brief summary in this thread of how we found the flight after we return - it'll be in a couple of months, though. Hopefully, it will help anyone else with similar concerns when flying the BA A380.