Putting mileage redemptions on hold

Hi guys,
I'm switching from my VS Amex to an Amex Plat, in part due to the ridiculous efforts I have to go to to use miles and companion / upgrade vouchers effectively. Figured that converting MR points to BA miles then upgrading cheapo WT+ fares to Club World is likely to be a better use of miles for me, and will at least give more flexibility.
Anyway, this will create the hassle of having to find reward availability on VS/BA, then transferring the MR points. Can you put a hold on VS reward seats (specifically in Upper) for a few days like you can with most cash fares. I wouldn't like reward seats to disappear whilst I was waiting for points to move from one scheme to another.
Wrong forum, I know, but does anybody know the answer to the same question but for BA.
Thanks a lot,
Ben
I'm switching from my VS Amex to an Amex Plat, in part due to the ridiculous efforts I have to go to to use miles and companion / upgrade vouchers effectively. Figured that converting MR points to BA miles then upgrading cheapo WT+ fares to Club World is likely to be a better use of miles for me, and will at least give more flexibility.
Anyway, this will create the hassle of having to find reward availability on VS/BA, then transferring the MR points. Can you put a hold on VS reward seats (specifically in Upper) for a few days like you can with most cash fares. I wouldn't like reward seats to disappear whilst I was waiting for points to move from one scheme to another.
Wrong forum, I know, but does anybody know the answer to the same question but for BA.
Thanks a lot,
Ben