Bob B, The Regimental History of the Border Regiment (1924) has a reference to the lst/4th battalion & the 2nd/4th Bn. but no ref to Lt. Phillips. I forward the details in case they are of use.
"It remained in India until the end of 1919, having served in the Third Afghan War of that year. Left Peshawar on the 11th November and embarked in H.M.T. FRIEDRICHSRUH on 15th. Disembarked at Plymouth on the 9th December and proceeded thence to various dispersal stations. The Cadre was sent first to Kendal then to Carlisle, being finally dispersed on the 31st January 1920."
PhilipG.