We are doing the same thing in September and will be our first trip with Virgin Atlantic – did you get a really good deal? You can get your BA PNR to load into MMB which will show details of all your flights including the Virgin ones but you will only be able to change seats on your BA flights. I seem to remember though that on Virgin’s bookings there were a couple of flight references, one of which is the BA one so you might not need to phone. We are getting 2,500 Avios and 80 TPs each.
In BA’s MMB it says that the Virgin seats will be available at check-in but we chose our seats via Virgin’s website.
Interestingly, our Virgin flights are showing as “First”. It will be good to be able to compare their offering to BA’s.