No 1 Entrenching Battalion was formed on the Salient early in 1916 and effectively disbanded in early September that year. The original battalion was almost exclusively formed from the remnants of 1/4th Battalion Queens Own Cameron Highlanders, and they were used en-mass to reinforce 1st Bn QOCH after the tragedy of High Wood 3/9/1916.
I’d be utterly grateful if anybody could tell me that I’m an idiot, and there is a war diary for them in ??? - otherwise ANY references to them during 1916 at all. (As far as I’m aware they only served on the Salient).