Maggiefly,
As a member of BASSA and also CC at LGW, I'm afraid I have to agree with both M.Mouse and Tandemrotor. In the past, BASSA have been very blinkered. However, following some changes at the top, things seem to be changing for the better with BASSA now able to see past the end of the golden runways. I won't go into it in detail as this is the pointy end thread but feel free to PM me with any questions you may have. Having been in a similar situation with another airline, I have been able to see the danger OS poses to us and have followed the situation from the start. Thanks to the flight crew that have been happy to sit and explain it all to me, I think/hope I have a fairly good grasp on whats going on.
Good luck in whatever you decide.
JSL