Was a procedure in the Air Europe Italy ops manual in 1990. Do not know if it came from Air Europe UK.Seems mighty strange procedure to me but may be less risky than having a ramp agent or engineer near aircraft with cellphone switched on whilst refuelling!!!
In 1990, there was no JAR-OPS. I flew the 767 in the UK around 1991 and there was no agreement for any refueling with one engine turning...
There is after all one thing to admit : as many people already wrote it in this topic, there is no real safety concerns in Blue Panorama. Too bad.