Hubnet, you say the examples are incomparable because of the cause? Are you kidding? It takes weeks to find that cause; how long do you want to sit in a burning aeroplane, cause unknown, before getting away? Likewise, prabellum, saying the Manchester is incomparable. Why? Aeroplane stopped on the runway, massive external fire... What is incomparable about that? Really, some people need to stop using little details to justify a bad big picture...
AS PT6 said, the crew are not at fault if they had not been made aware of the problem, but given fire crews rocking up and spraying, they must have been made aware at some point prior to the fire trucks arriving so that they didn't taxy.