I was one of the crew on this Rescue, and we did 5 hours for the job. I did check the form R, and it doesnt' say the time you mentioned. We filled up to 6200lbs (Max fuel) which gave us 5800lbs usuable. The fuel burn was high initially because of the weight, therefore we landed with 400lbs of usuable fuel. We did have the option of going to Faroes, which would have given us an hour on scene, but if possible, it was better to return to Stornoway due to lack of SAR cover in Scotland and incase of a problem for ourselves we could rely on Stornoways Helicopter. I hope that answers your questions.