The next few months were, for Nickall's brigade, spent in training for eventual overseas service until August 1915 when it departed for the Western Front.[3] The brigade, along with its commander, first saw action during the controversial Battle of Loos in September, where Nickalls was, according to the brigade's war diary for 26 September, the first day of the battle:
Action at the Chalk Pit. Brigadier-General N. T. Nickalls, commanding the Brigade, wounded and missing.[5]
In an appendix to the diary:
It must have been about this time that Brigadier-General Nickalls was hit. One officer (Major Bullock, West Yorks. Regt.) states that he saw him hit near the Chalk Pit, but all efforts to find his body proved unavailing.[6]
Brigadier-General Norman Tom Nickalls has no known grave, his body not having been recovered. He is commemorated on the Loos Memorial.[6]
Davies, Frank; Maddocks, Graham (2014) [1995]. Bloody Red Tabs: General Officer Casualties of the Great War 1914–1918. Pen and Sword Books. ISBN978-1-78346-237-7.