London Borough of Sutton

Sutton Council issued an apology after it "accidentally" released the identities of those who had received benefits.

After disclosing the names of the family, their ages, the address of their home, their needs for a handicap and their mental health difficulties, the ICO penalised them £150,000.

When they learned about the incident, they erased the disputed data right away.

Source: https://www.yourlocalguardian.co.uk/news/15418376.sutton-council-apologises-after-publishing-names-of-benefit-recipients-in-a-concerning-data-bungle/

"id": "LON850271022",
"linkid": "london-borough-of-sutton",
"type": "Data Leak",
"date": "07/2017",
"severity": "60",
"impact": "2",
"explanation": "Attack limited on finance or reputation"