Thanks, Steve. However, going back to the original post in the thread - what would you do if the plane you thought you were going to be on was substituted for a 787? I'm awkward enough individually to say "I'm not getting on that!", take the financial hit, and then start a legal case to find out the extent to which we, as passengers, can be given the stark choice of boarding a certain plane when there is credible evidence that there are significant safety issues, or lose time and money. Essentially, it would be a challenge to discover when it is that the contractual conditions presented by the airline are unreasonable.
However, if I'm with my wife, that option would not be available ... if you know what I mean