"Clearly this is a complex investigation, which has involved a significant number of cases which have had to be examined in detail.
"We are methodically working our way through this and we are making progress. We have contacted everyone affected by this investigation to explain the situation to them and we continue to provide specialist support from Family Liaison Officers.
"We understand however that other people may have concerns and we have a dedicated phone line for callers to leave a message for the investigation team.
"That number is 01642 301677.”
More top news
What has the weekend got in store for the Tyne Tees region?
The operation took around three hours to complete, with the remains being disposed of by a specialist animal by-product company.
Local MPs are now writing to the Prime Minister demanding that statutory redundancy is paid from another budget.