Someone claiming to have been on the flight has just posted this on the Daily Mail article comments....
This is a total fabrication of the truth. My wife and I were both sat in first and we're actually among the last off of the plane! Due to the damage the plane had sustained and the narrow taxiing area, the plane was disembarked via seat rows from the rear left exit. As such, passengers in economy left the plane first, followed by business and premium economy and finally first class. Nobody received preferential treated in the emergency situation!! I suspect that's Mrs Oxfam hoped to jump the queue for hotel room by complaining on twitter, whilst everyone else waited in line for their turn.
Judge for yourself the veracity