In 2019, Sellafield reported a leak from the storage unit to the ONR. The leak significantly worsened over the next two years, and a previously unreported document reveals that 2.3-2.5 cubic metres of radioactive “liquor” has been leaking from the facility every day.

In July last year, the Committee on Medical Aspects of Radiation in the Environment noted in its public minutes that “the leak has been continuing at the same rate since October 2020, around 2.5m [cubic meters] per day …”.
However, the extent of the radioactive material lost to the ground from the leak was redacted from the meeting minutes.

the Guardian

Revealed: Sellafield nuclear site has leak that could pose risk to public

Safety concerns at Europe’s most hazardous plant have caused diplomatic tensions with US, Norway and Ireland