Reclearance / redispatch
"Major deviation would therefore no longer have been possible anymore," says Gerhard Huttig, an Airbus pilot and professor at the Berlin Technical University's Aerospace Institute. If worse came to worst, the pilot would have to stop and refuel in Bordeaux, or maybe even in Lisbon."
Luckily 'expert' Huttig is not flying me around, as he has not noticed that the deviations made by the other flights that night were insignificant in fuel usage terms.