This doesn't directly explain your query but in July 1987 I flew Corfu to Manchester via Brindisi on a Britannia 737 (actually a 737-200 hired from Aer Lingus). During a cockpit visit with my sons - remember those? - the captain told me the high temperature at Corfu allied with the shortish runway and a heavy payload of pax, baggage and fuel necessitate something to give so he had some fuel taken off at CFU and made the short hop to BDS for a splash and dash. My recollection is of a very hot 45 minutes on the tarmac at BDS