So as I understand it, booking B has been cancelled by BA (whether 1 leg or more doesn't matter) and you haven't rebooked it - so I would say certainly you can "claim" 240 TP from that.
Yes, booking B is cancelled and I haven't rebooked it so it currently takes me to the disruption recovery page, where I haven't accepted their proposed new flights. I also claimed 240 TP in my second email.
What I'm still not clear about is what is the current status of booking A?
Booking A is still active as they haven't cancelled it. If they do I'd have an even stronger case!
Do bookings A and B therefore still exist for future dates?
BA has cancelled a leg on B and it currently stands as such, while A is active for a future date.
I would have thought you would be on stronger ground if, as a result of BA's flight cancellations, you had cancelled the bookings for refunds.
I haven't requested refunds on them yet, are refunds on cancelled flights more likely to give Gold upgrades than FTVs, if I were to accept one?