I was one of them
I was one of the people to be told that I might have been hacked.
The first email from BA was extremely poor - so much so that I replied to tell them it was piss poor (without any reply back). Basically, it was "we allowed your details to be stolen, we're sorry, get in touch with your bank". No explanation just curt
So far no untoward activity - but according to my bank I now have to sign up to Experian to make sure some other finance/policies have been taken our in my name.
So yes I am angry. I've been put out and now have to live with uncertainty. Yes BA need a lesson where it hurts. 35% is expensive, but its no win. So stop with the moaning at lawyers you unreasonable people. Wait until it happens to you