<sod>The '''258th  Tunnelling Company''' was one of the [[Tunnelling companies of the Royal Engineers|tunnelling companies]] of the [[Royal Engineers]] created by the [[British Army]] during [[World War I]]. The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of [[Mining (military)|mines]] under enemy lines, as well as other underground work such as the construction of [[Dugout (shelter)#World War I|deep dugouts]] for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.<ref name=tunnelcoyre>[http://www.1914-1918.net/tunnelcoyre.htm The Tunnelling Companies RE], access date 25 April 2015</ref><eod>
<sod>The '''258th  Tunnelling Company''' was one of the [[Tunnelling companies of the Royal Engineers|tunnelling companies]] of the [[Royal Engineers]] created by the [[British Army]] during [[World War I]]. The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of [[Mining (military)|mines]] under enemy lines, as well as other underground work such as the construction of [[Dugout (shelter)#World War I|deep dugouts]] for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.<ref name=tunnelcoyre>[http://www.1914-1918.net/tunnelcoyre.htm The Tunnelling Companies RE] {{wayback|url=http://www.1914-1918.net/tunnelcoyre.htm |date=20150510184955 }}, access date 25 April 2015</ref><eod>