FlyerTalk Evangelist
Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: BA Silver, TK E+, AA PP, Hyatt Globalist, Marriott LT Plat, Hilton Diamond
Posts: 13,048
It will be safer to book on two separate airlines. Different alliances even better... If you book everything on BA and credit it all to BAEC, your plan becomes quite obvious and, as others have mentioned, this is something that BA could decide to look at.