The body of a man lay inside his van parked at a pub in Cambridgeshire for four months.
The landlady of the Lazy Otter at Stretham near Ely said police ignored her attempts to tell them the van was there.
The death of Paul O'Brien from Cambridge is not being treated as suspicious but the police say they are reviewing their response.
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The grandparents of missing serviceman Corrie McKeague have travelled 425 miles from their home in Scotland to retrace his last steps.
A dry night with broken cloud and occasional clear spells. Generally cloudy with occasional outbreaks of rain during Thursday morning.