The Original link to the newspaper article states..
about two hours into the
British Airways flight when I popped down the foot stool so I could get some sleep and saw the vomit on the seat.
so the puke was on the seat not footrest
i would refuse to sit there and if no alternative seating available more than happy to switch with a cabin crew member and spend the duratuon of the flight in a jump seat.
rather that than sitting in someone else's puke.