A whole month
The PSNI didn't tell the 200 people affected by the theft for a month, and then claimed no information was taken from the device.
But that issue is moot considering the officers' info was released later anyway.
From the Graun:
Last weekend it emerged that about 200 police officers and staff were not informed for almost a month about the theft of devices and documents with data potentially affecting them, the PSNI said.
A police-issued laptop, radio and documents were stolen on 6 July from a car parked in Newtownabbey that is understood to belong to a superintendent.
Todd said in a statement last Saturday it was believed the laptop and radio were deactivated “shortly afterwards”.
“We are confident no data has been lost from these devices and they are of no use to any third party,” he added.
https://www.theguardian.com/uk-news/2023/aug/16/man-arrested-after-northern-ireland-police-data-leak