BAA operate Heathrow so certainly not BA’s fault and they have nothing to apologise for or pay you compensation. However a man of your import having to disembark an hour late and then only after the second and third class passengers is clearly a vile breach of your most basic human rights and you need to take your case to the European Cuort of Human Rights whilst you still can. Perhaps the forum could award you a DYKWIA award to provide you with some comfort.