Viscount fuel starvation, Exeter
Reading between the lines there was a regulatory failure to pick up the lack of proper procedures, behind the more obvious operational failures on the day.
CAUSE: "The accident was caused by the aircraft running out of fuel due to the crew's erroneous belief that there was on board sufficient fuel to complete the flight. The aircraft's unreliable fuel gauges, the company pilots' method of establishing the total fuel quantity and lack of precise company instructions regarding the use of dripsticks were major contributory factors. Meter indications on the refuelling vehicle at Santander, which cannot have reflected the quantity of fuel delivered, are also considered to have been a probable contributory factor."
As an aside, a few days after the incident, an argument in the Gulf Hotel Muscat bar between those who blamed the Captain for failing to ensure adequate fuel was on board, regardless of how difficult that might have been (dripsticks etc), and those who regarded him as blameless because he was told it was OK, ended in an unseemly brawl involving locally-based GF pilots and visiting GF long-haul crews.