This is an example of the aircraft that crashed. (Image: Geoff Collins / Flickr)
A plane flipped upside down after it hit power cables on approach to landing in Hertfordshire.
The Air Accidents Investigation Branch said the DH82A Tiger Moth G-AJVE had descended too low on approach and struck low tension power cables near Tring.
"The aircraft then suffered a hard landing, which damaged the landing gear and caused the aircraft to bounce," it said.
On the second touchdown, the damaged landing gear dug into the grass, which caused the aircraft to twist and then flip upside down.
Investigators said both people on board escaped the crash on September 15 last year uninjured.
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