Ooh, you get to travel back together! This makes me very happy. Yay!
Indeed - it's worked out quite well really.
I normally fly over in the summer period for visiting purposes and also to pay my share of the rent for our flat, so I booked my flights as per usual back in June when BA had an offer on. But, this time, I did pay extra to get a semi-flexible ticket on the return leg just in case (i.e. they let you change the return date, but for a fee), but it looks like I don't need to do that now.
Still not sure whether they're going to be able to sit us together. You see, to get a semi-flexible ticket, I had book in a higher class of cabin, which was affordable back in June, but is eye-wateringly expensive now - as in thousands of pounds. I'm hoping that BA will flash up an upgrade offer (preferably with miles), or we'll be able to do something at the airport. Though, my better half holds the view that flight upgrades are a total waste of money and probably won't let me splash out anyway...
As for FLR(M), when the time comes I think you'll find it's much MUCH easier. You can both be together for it, you can count both incomes to meet the requirements, and you've done a successful visa application already, so you know kind of what to expect! The first one is the hardest, and now you have that out of the way.
Yeah, I've taken some snapshots of ksand24's rather splendid document checklists for FLR (M). One of the first things I'll be doing when I get home is investing in a shiny new 'correspondence box' to retain all the acceptable mail items we receive over the next few years. I've already switched my bank statement preferences to paper, which, in truth, I wish I'd known to do ahead of the entry clearance application. Would have saved a big printing and stamping exercise at the bank, which, to be fair, the staff were happy to help with.