 East Yorkshire Regiment during the Battle of the Somme, and the third son, Second Lieutenant Ernest Christopher Elmhirst, was killed on 7 August 1915, aged 20, while serving with the 8th Bn.Duke of Wellington's (West Riding Regiment) during the Gallipoli Campaign; both during World War I.The fourth son, Thomas became Air Marshal Sir Thomas Elmhirst (KBE, CB, AFC, DL, RAF).