The Health and Safety Executive is now leading the investigation after a Royal Estate worker at Sandringham had to be rescued from a lake .
The gardener who is in his 30's was on a ride-on lawn mower when he fell into the water. He remains in a critical condition at Addenbrookes Hospital. Norfolk Police say they are no longer leading the investigation into the incident.
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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.