In October 1916, he re-enlisted with the British Army and received training with an Officer Cadet Battalion in Cambridge, subsequently receiving a commission in January 1917, as a subaltern with the 10th (Service) Battalion, of the Somerset Light Infantry Regiment, a home service battalion, with which he served as a training officer for the rest of 1917, the permanent infirmity of his 1915 wounds preventing further active service at the front.