Network of World War I trenches discovered on Hoo Peninsula

www.bbc.co.uk/news/uk-england-kent-22183961

The Hoo Peninsula was seen as a forgotten backwater, but aerial archaeology has established it was at the centre of the development of military technology.

"Much of the work done here was top secret and very few records were kept," Mr Robinson said.

"Experiments in trench design, airship construction and explosives all took place here and they had a profound effect on the course of WWI."

Image caption Much of the area's history is being recorded before it is destroyed by coastal erosion and development

Much of the area's history is being recorded from the air before it is destroyed by coastal erosion and development.

The trenches are just one of the features revealed by the first full aerial survey of the area by English Heritage.

The world's first Brennan torpedo launch point has been discovered at Cliffe Fort, and Mr Robinson also identifies a new site with the help of aerial photos.

The previously unidentified buildings were part of a complex where the Royal Navy designed, built and tested their airships.

A small collection of buildings that lay in obscurity for decades is also identified as a World War I anti-aircraft battery - Britain's first purpose built anti-aircraft gun emplacement.