Originally Posted by fp7100

I'm new here, so forgive me if this is already covered.. but I couldn't find it.

I fly roughly once per month from Japan to Europe with work. Domestic (JP) in Y and other legs are generally M. Domestic and HND-LHR are JAL; European connections with BA.

I am silver with BA, and have no status with JMB currently.

My questions is twofold:

1) Am I better building up status with JAL? (note that BA only give 50% milage for M, whereas JMB gives 70%)

2) If I do switch to crediting my flights to JMB, can I still use my BAEC silver status perks (i.e. use the lounge until I reach sapphire with JAL)?

A side-note - my silver status card got delivered to my U.K address. Assuming I don't register my FFP at check-in, can I just give my BAEC number until I pick the card up? Or do I physically need the card?

Thanks in advance..