Originally Posted by
LondonElite
If you are on one PNR (ie one ticket reservation) you will be protected in case of delays or cancellations. US will/should put you up in a hotel and rebook you as necessary. Note also that if you are substantially delayed or your flight is cancelled, you are entitled to compensation under the EU's scheme EU261/2004. There is excellent guidance around this in the BA forum. Happy travels!
I'm afraid the tickets won't be on the same PNR. One is already booked, I'm just thinking about booking the other. They won't merge nested tickets into the same PNR, will they?