From what I have seen from various units, the standard was two pairs of shoulder titles. It is possible that so early in the war, they were not quite aware of procurement difficulties that would quickly develop. ie. numbers required, the conservation of wool and slow shift to printed titles. Considering each man only wore at most two tunics, ie BD and W out Dress ( Service Dress ) or two BD etc. why would they need more than two pairs? If they required more, then they could ask for them. I have also read in many places that numbers issued were soon restricted due to many giving them away as souvenirs or trading etc. This applies to shoulder titles and cap badges. It is also interesting that difficulties in issue arose for certain units due to large shipments of badges being sunk by the enemy.