Blackace - I think your attitude to this issue is regretable. You're right nobody died. However you claim to well paid - great, that suggests you have a sense of professionalism. In the real world of software things are tested. In the real world of software you manage risk and don't let 2 different suppliers change 2 things at the same time. T5 systems have been tested for month or years in some cases. Why didn't the changes to T4 get some decent testing? Does this sound professional to you?
Were the changes being made early in readiness for the Skyteam people moving into T4? If so, I hope BA sue both the BAA and the suppliers for the consequential loss they've inflicted on BA and more importantly the customers. You'd all deserve it.
CB