VS - thanks very much for that information. If BA think we are going to sit and wait for 4 weeks just for an acknowledgement then they can have another think.
Unfortunately my wife was only travelling peasant class and I've only ever made it to silver, so we'll give it a couple more days and then try the Willie Walsh idea. Is the Air Transport User's Council or any other body worth trying?
If all else fails I can certainly cost BA enough business for them to come out second on the finances