AN 11-YEAR-OLD killed when he was struck by a falling tree branch died from a head injury, a post-mortem examination has found.It is thought the section of the tree which hit Daniel Mullinger, from Stanway, near Colchester, weighed up to four tons.

AN 11-YEAR-OLD killed when he was struck by a falling tree branch died from a head injury, a post-mortem examination has found.

It is thought the section of the tree which hit Daniel Mullinger, from Stanway, near Colchester, weighed up to four tons.

An inquest into his death was opened and adjourned yesterday, two days after the Heathlands Primary School pupil died while on a school trip in the grounds of Felbrigg Hall, Norfolk.

The schoolboy was with a group of nine other pupils taking part in an orienteering exercise in a little-visited part of the estate's Great Wood at about 3pm on Tuesday when the accident happened.

Yesterday a second 11-year-old boy, thought to be Daniel's best friend, suffering from pelvic and internal injuries was transferred from Norwich and Norfolk University Hospital to London's Great Ormond Street Hospital.

Norfolk Constabulary said he was in a “critical but stable” condition.

A 10-year-old boy who had an injured wrist and a girl, aged 11, with leg and arm injuries, were both released from hospital.

There are about 50,000 trees in the 500 acre-wood and the National Trust said it regularly inspected all of them.