To make it easier (so you don't have to type in all that site:flyer... malarky), I've just set up this Custom Google Search Engine:

http://www.google.com/cse/home?cx=00...27:xcmjxmxz6j8

or for easier reference:

http://bit.ly/FindBA

It does all of the above, ie it will search both BA.com and only the BA FT forum. I realise it's a little like FT's own custom Google site, but this one searches just BA resources.