IWM caption : "THE BRITISH ARMY ON THE WESTERN FRONT, 1914-1918. A <a href="https://en.wikipedia.org/wiki/QF_13_pounder_9_cwt" class="extiw" title="en:QF 13 pounder 9 cwt">13 pounder (13pdr), 9 Hundredweight (9cwt) anti-aircraft gun</a> on a Mark IV Motor Lorry Mounting seen in action at St. Vaast, 13 March, 1918. Note man on right wearing headphones by which the range is received".
McLellan, David (Second Lieutenant)
Taken on 13 March 1918
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<td>This photograph <a rel="nofollow" class="external text" href="https://www.iwm.org.uk/collections/search?query=Q+8558">Q 8558</a> comes from the collections of the <a rel="nofollow" class="external text" href="https://www.iwm.org.uk/">Imperial War Museums</a>.
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<td align="right"><img alt="Flag of the United Kingdom (3-5).svg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/83/Flag_of_the_United_Kingdom_%283-5%29.svg/80px-Flag_of_the_United_Kingdom_%283-5%29.svg.png" decoding="async" width="80" height="48" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/8/83/Flag_of_the_United_Kingdom_%283-5%29.svg/120px-Flag_of_the_United_Kingdom_%283-5%29.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/8/83/Flag_of_the_United_Kingdom_%283-5%29.svg/160px-Flag_of_the_United_Kingdom_%283-5%29.svg.png 2x" data-file-width="177" data-file-height="106"></td></tr></tbody></table></div>