On youtube under "Trouble at Barregarrow" and others are shocking - why is there only a lack of adhesion flag initially when there's litres of oil all over the line at the bottom of Barregarrow ? .. why is there a marshal waving his hands to the bikes ? you are totally committed on the approach never mind after you've tipped in at that speed, what the hell is going on there ?,  was it flagged before the bottom ? surely that should have been waved yellows right up the hill until the oil was cleared/dealt with ?.