“This is a pattern that must stop,” says the Information Commissioner’s Office.
A third-party supplier was targeted in a ransomware attack, making the force the fourth in the UK to experience data breach problems recently.
Lessons from the data breach at the Police Service of NI in which personal information on its 10,000 staff was mistakenly published online.
Names of officers, ranks, photos, vetting levels and pay numbers are believed to have been leaked in the data breach.
Personal details of more than 1,200 crime victims and witnesses were released due to police mistake.
The leaked data named MI5 officers, and gave surnames and other data of more than 10,000 individuals.