Originally Posted by
Himeno
Yes, BA1/2/3/4 can be used as part of a DONEx or AONEx. I saw it appear on the booking tool a couple of days ago. It will only show up if the D bucket is available on that day.
Also bear in mind the fact that unless you are flying into LCY on the sector before (and not LHR) then you will use a sector getting from LHR-LCY on your D/AONE ticket.