Relatives of patients who died after receiving "dangerous" levels of painkillers at Gosport War Memorial Hospital have called for new inquests.
An inquiry found 456 patients died after being given opiate drugs at the hospital between 1987 and 2001, but no charges have ever been brought.
Four families told the BBC they have requested judge-led "Hillsborough-style" hearings with a jury. The Attorney General's Office said it was reviewing the application.
Police began a fresh inquiry in 2019 into 700 deaths after the Gosport Independent Review Panel found there was a "disregard for human life" at the hospital in Hampshire.
Coroner-led inquests in 2009 found drugs administered at the hospital contributed to five deaths.
However, lawyers representing some of the families told the BBC more wide-ranging inquests similar to those that examined the events of the Hillsborough disaster should be undertaken.
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Source: BBC News, 5 February 2021