A WAR-TIME invasion plan revealing Adolf Hitler's intended plans to attack Southampton is up for sale.

The news comes after the detailed document which was compiled in 1940 has been consigned for sale by a European private collector with C&T Auctions of Ashford, Kent.

It is expected to fetch up to £350.

The document contains a street map of the city as well as a photos of Southampton pier.

It also includes aerial photographs of Portsmouth and Porchester Castle.

The pack is titled Militargeograogische Angaben uber England' which translates to military geographic information about England.

It was sent to sent to German headquarters' in western Europe in August 1940 in readiness for Operation Sea Lion - the German invasion of Britain.

This was two months after the evacuation of 330,000 Allied troops at Dunkirk and at the height of the Battle of Britain.

Matthew Tredwen, specialist at C&T Auctions, said: "This is an interesting folder of booklets and maps given details of strategic areas for the German soldiers to attack and hold during the operation against the British isles in 1940.

"The booklets cover various areas of the UK and have black and white images of strategic landmarks and the coast line.

"A lot of the images were from postcards and the British did exactly the same thing with their D-Day preparations.

"It is chilling to see just how much information the Germans had amassed about Britain, and how well prepared thery would have been if the invasion had been launched."

The images included in the document were likely taken from tourism postcards and were distributed to give the troops the best idea of the landscape they would encounter after landing on these shores.

Other geological maps which are colour coded show the soil types of the land so the Germans knew which tanks could be used where.

Operation Sea Lion was postponed indefinitely on September 17 1940 due to increasing air losses.