Originally Posted by camdentown

Indeed. But Spain has Iberia which is also IAG already.
The Scandinavian countries have Finnair or SAS - arguably better than BA and Finnair certainly is for One World status.
KLM has feeder flights all over Europe (KLM City Hopper)/
BA is London Centric, and to a large extent so is VS - so similar passenger profile I'd suggest.
I would hope that MAN, GLA and EDI passengers have already left BA since it abandoned regional flights other than to LHR. Although the higher fares from the regions via LHR on BA would give them more TPs than London based passengers!