On 27 August 2023, a Boeing 737-800 was subjected to significant en-route ATC delay whilst en-route from Glasgow to Palma de Mallorca after adverse weather affected all three Balearic Islands. After multiple ATC errors a MAYDAY was declared for low fuel before a subsequent landing with less than Final Reserve Fuel despite extra fuel having been carried. Confused ATC flight handling in both French and Spanish en-route airspace was attributed to an excessive workload which resulted in no pre-tactical measures being taken and subsequent errors in the implementation of the tactical response which then led to use of reserve fuel.