Thanks everyone.

I noted when I booked VS flights earlier in the year that lastminute.com took longer to notify me of a flight change (I found out about it 24 hours earlier through Virgin Atlantic when i called about another issue and it was mentioned in passing by the VA rep).

But missing out on 4000 Virgin Atlantic Flying miles for free makes me thinks the risk is worth it to Boston- they have 4 flights a day to BOS.

As an aside, does anyone know if all BA B777s will be fitted with the new WT+ seats by October? I know the B777-ERs already are. And are BA planning on the WT+ upgrade on their B747s also?