@wittmann:
Two years later the pair died when their balloon exploded while trying to cross the Channel. The hydrogen had been ignited by the fire fueling the hot air. Let that be a lesson: no one invades England!
Invading England by balloon from the Continent is pretty impractical, since the prevailing winds tend to blow in the wrong direction – so de Rozier and d’Arlandes would have been better advised to do so by ship, in the same manner as Julius Caesar, Claudius, Hengist & Horsa, assorted Viking raiders, and William the Conqueror.