That will be the 77H and you can see the seatmap configuration here. Just watch for any window blanks of you prefer a window seat. I think there are three, 7, 12 (and 15 partly)

Personally I'd choose 5 and 6 or 2 middles in 6 if you prefer to stay together.

https://www.flyertalk.com/forum/brit...ng-777-a.htmln in the Wiki.