Wirelessly posted (BlackBerry8530/5.0.0.601 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
Be aware that you will be assessed hefty fuel surcharges if you fly BA on the TATL leg.
In order to have a stopover (as opposed to a mere connection) in a North American city, you must fly on a direct flight (single flight number) from that city to Europe.