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 first pictures have emerged of a couple found dead at their house in Stowmarket in Suffolk.
The trust which runs Burghley House near Peterborough has been fined £266,000 after a butler was crushed to death in a luggage lift.
A couple found dead in their Suffolk home have been named locally as Richard and Sarah Pitkin.