Were the winds still blowing strongly? I can't think of any connection between this event and such a hard landing. If the pilots were feeling unwell why not drop not Scotland or Manchester? Why not autoland? Burst tyres and MLG fire suggest a braking issue rather than touchdown g's. If they elected to fly an extra hour to return to AMS, there should be no panic to vacate. If there was a fire/smoke, does that suggest they had to stop on the taxiway and thus delay embarkation? i.e. achieve the opposite of being expeditious.