Sorry to dig up an old(ish) thread here.. I've taken this one several times as I'm running a project in both Stockholm and Helsinki so I split my week between the two and use the BMA-HEL flight to get to Helsinki before heading back home to LHR directly.. it's a short flight so they only serve a sandwich in J, but hey better than nothing...
It's a very convenient flight for me as I have client offices very close to BMA and HEL... I know our client uses it frequently so I think AY is doing quite well profit-wise on this route already.
Though someone will have to take the mantle from me soon as I'll soon have finished my project so won't be subsidising the route much longer :P