“His intelligence and sharp wit was apparent from the outset; there was an ever-present twinkle in his eye and he would gladly admit that his youth had been full of adventure.”Dean was simply one of those people whose infectious humour and enthusiasm drew others to him. His professional knowledge was second to none and his sage advice already something I had come to rely on. A British Army officer has died at an Iraqi air base where UK troops are training local forces to fight Islamic State militants.Army investigators are probing the death of Capt Dean Sprouting at the sprawling Al Asad base, but said he did not die of enemy action. The soldier is not thought to have killed himself and commanders are investigating whether he died as a result of a vehicle accident, a defence source said.The officer with the Adjutant General’s Corps was serving at the air base with Black Watch, 3rd Battalion, Royal Regiment of Scotland.Lt Col Rob Hedderwick, the battalion’s commanding officer, said: “It is hard to do justice to a man such as Dean Sprouting with simple words.”In no time at all he had become an indispensable part of the battalion, not only for his professional expertise but also for his compassionate manner and camaraderie. “His loss is keenly felt by us all and our thoughts and prayers are with his wife and children whom I know he cherished more than anything else in this world. I am hugely proud and thankful to have known him. He was a very good man.”The father of two, of Denny, Stirlingshire, joined the army in 1989 and had served in Northern Yugoslavia, Cyprus and Kosovo, Sudan, Angola and Germany. British troops have been training the Iraqi Army at the Al Asad air base in IraqCredit:Jamie Wiseman Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.