Well, the shocking part in the line of fit is not the 10k WR ability but the ability to better HM record by over a minute...a lot of training to be done but right now Mo struggles to even beat 60. His London dropout half was full gas and his great north performance was full gas as well.
His legs were empty, he was trippin down that downhill. A runner with reserve in the legs and lungs goes more aggressively into downhills and most importantly, keeps form.
So he basically has to go from 60 flat -> 57 low HM. His training has not been suited to the marathon, it was track training aiming for a fast finish but his mileage limit has been reached. Only levers left are the sessions itself and the intensity.
Most critical thing is changing his metabolism from a glycogen driven, highly lactate tolerant engine to a fatty acid consuming marathon diesel.