You won't get a no-refurbished AA 777 on the LHR route anymore apparently, saw AA announced recently it's now fully flatbed.
And I also saw that the 772 that are refurbished are being refurbished again with yet another new seat in J (the same one QR use on the 787/A380/A359) - first one has already been done. They'll be using this on the 772, replacing the Zodiac one they'd already started fitting due to supply issues