A SEVEN-year-old girl died after the bouncy castle she was playing in at a fun fair was blown away.

Summer Grant, from Norwich in England’s south east, suffered multiple injuries, a post-mortem examination has shown.

She had been with her family at the family-run Thurston fun fair held at Harlow Town Park in Essex on Easter Saturday when the bouncy castle she was blown more than 135 metres about 4pm (2am Sunday AEDT).

A man, 27, and 24-year-old woman, from Cambridgeshire, who were arrested on suspicion of manslaughter by gross negligence following the child’s death, have been released on bail pending further inquiries.

A collection of floral tributes and teddy bears adorned the entrance to Harlow Town Park a day after the tragedy as people came to pay their respects.

The fair was closed on Easter Sunday but a steady trickle of people visited the park, leaving messages including: “God has taken a beautiful girl for his angel. RIP Princess.”

A sudden gust of wind blew the bouncy castle off the ground and over a number of trailers and caravans on the site, said Ray Smith, from The Showmen’s Guild of Great Britain.

“It was a sudden gust. Had it been a consistent wind they would have closed down all the inflatables,” Smith said.

Video footage has emerged of police running to the scene, and detectives from the Kent and Essex serious crime directorate, which is leading the investigation, have appealed for anyone with footage or information about what happened to contact them.

“This is a very tragic incident where a young girl has lost her life. My deepest sympathies go out to her family,” police detective Daniel Stoten told the Essex Chronicle.

“We are trying to establish the circumstances surrounding how the girl came to be injured and I urge anyone who was at the event and witnessed the incident to contact me.

He added weather conditions on the day will be a factor in their investigation.

“The weather will certainly make up part of this investigation — whether the weather was a factor and whether or not it was appropriate for the ride to be running.

“It will be a complex and thorough investigation — I do not anticipate this to be a quick inquiry, it will be a lengthy investigation.

“We will be speaking to scientists in relation to the weight of the ride, the type of weather, the ground underfoot, the moisture content, and how the ride was tethered.”

Last year a bouncy castle collapsed while children were playing on it during a fair in the same park. It was reported at the time that three children had to be treated by paramedics when the inflatable castle collapsed on them.