In the Territorial Battalions of the Manchester Regiment, soldiers had always been issued with four figure service numbers which were unique only within the regiment ( other regiments did expand to five figures). As the army expanded beyond any the concepts of pre-war thinking, it was decided to renumber the terriers with six figure service numbers, these would be still regimental but gave a much wider range . The effect we can see now is that when we view a MIC (Medal Index Card) for a territorial soldier, he will have his original four figure S/N (service number) and under it a six figure number issued later.
Where a six figure number appears in a MIC it's possible to trace the battalion by the number alone, the list below lists the blocks of numbers allocated to the Manchester regiment, we have the detail available for other regiments as well
The Army Council Instruction (ACI) 2414 of 1916 was made public on 23 December 1916. Thes changes took effect on 1 March 1917, but were issued to the soldiers prior to that.
These were the numbers allocated to the Manchester Regiment Territorial battalions