Details received via an OIA regarding the volume of non-priority applications lodged in the final days of 2018:
"As at 29 July 2020 the following number of applications were accepted on the below dates:
Total applications
• 21 December 2018: 39
• 24 December 2018: 32
• 27 December 2018: 12
• 28 December 2018: 05
Non-allocated applications
• 21 December 2018: 30
• 24 December 2018: 24
• 27 December 2018: 11
• 28 December 2018: 04
Please note that the above figures are broken down into total applications on hand and separately, non-allocated applications. The total applications show the total undecided applications which have come from the non-priority queue. The non-allocated applications show the applications as of 29 July 2020 which remain unallocated in the non-priority queue.
The difference between the two columns shows the amount from the non-priority queue which are currently allocated to an Immigration Officer for assessment but remain undecided."
So this proves that INZ are allocating non-priority applications out of date order, as 8 applications lodged on 24 Dec have already been allocated while there are still 30 applications lodged on 21 Dec still waiting in the queue.