Originally Posted by
nickdel
I usually fly into LCY (for convenience) and out from LGW (for price & lounge) but it's impossible to get these options at the moment.
What happens if you go via that ba.com link, choose multi-city, and then select EDI-LCY and LGW-EDI? When I tried it a few minutes ago, selecting specific airports like that actually brought up the radio button page listing every EDI-LON and LON-EDI flight on each day.