Battle patches of the 164th Brigade, 55th (West Lancashire) Division in the First World War, 1917 onward, (l-r, t-b) 1/4th King's Own Regiment, 1/8th King's (Liverpool) Regiment, 2/5th Lancashire Fusiliers, 1/4th Loyal (North Lancashire) Regiment, 164th Machine Gun Company (a simplified crossed machine guns of the Machine Gun Corps badge), 164th Trench Mortar Battery (a stylised trench mortar bomb).
Coop, J. O. (1919)       The Story of the 55th (West Lancashire) Division, Liverpool:  Liverpool Daily Post Retrieved on 3 September 2019.
Original: British Army Vector:  Usedtoknowthat