Menin Gate Memorial
Margaret Allison states that his address in 1911 was 106 Pont St, Ashington.
Morpeth Herald 23/07/1915 carries a brief obituary:
Private George Borthwick (19), was killed in action in France on June 16th. He belonged to a soldier family, being a son of the late Sergt.-Major James Borthwick, of Montrose, nephew of Q.M.S. John Borthwick, R.E., and the son of Mrs Young, 100 Juliet Street, Hirst, Ashington. He was killed while serving with his brother, Corp. James Borthwick.
George Borthwick is remembered at Ashington on A17.01 (A17.27) and A17.43 and in the Battalion History