Originally posted by PaulSEA1:
RE codeshares:

What are the OW codeshares from NA to LHR using BA metal but another carrier's code?

Code-sharing with Finnair extended

British Airways and fellow oneworld member Finnair have extended their code-sharing agreement to include their first "joint" longhaul route.

Finnair’s AY flight codes have been added to one of the UK airline’s twice-daily services between London Heathrow and Toronto.

The two airlines currently place one another’s codes on their services between the UK and Finland and some domestic and shorthaul connections, with the BA prefix added to 47 Finnair flights serving 11 destinations, and Finnair's AY code added to 39 British Airways services to ten destinations.

Copies of this and all other press releases issued by British Airways can be viewed at http://www.britishairways.com/press