See how you go with this.....
BD*G Liftetime, Current Expires Dec 12
BA Silver - Earned Oct last year, membership year is Sept.
Currently my BA Silver Status runs through to Sept 13, as I earned early this year.
When do I match my BD*G? I'm assuming it's at the last possible minute, will we get fair warning?
NB - Silver is "good enough" for me on BA, so I'd be looking for the longest period of Gold, then soft land to Silver then maybe a quick AA MR to restore Silver for a couple of years.
(OT: the best value BA MR seems to be just after your status drops Silver to Bronze. Regain Silver then you have the current year + the next year to use the status)