Hitler's How To guide to invade Britain: Detailed maps, sketches and even holiday postcards show the lengths Germany's Operation Sea Lion planners went to as they prepared to bring war to UK

In this June 26, 1977 file photo, demonstrators carry signs of, from left, Adolf Hitler, Anita Bryant, the Ku Klux Klan and Idi Amin, chanting ''Human rights now,'' during the annual Gay Freedom Day March in San Francisco. Bryant, an anti-gay activist, led a successful campaign to overturn a Miami-Dade County ordinance outlawing discrimination against homosexuals in 1977

 A remarkably-detailed Nazi map revealing Adolf Hitler's plans for invading Britain is going up for auction. 
The chilling document, which was compiled in the summer of 1940, contains reconnaissance photographs and maps and every town along the south coast.

 One place earmarked for invasion would have been Hastings in East Sussex, raising the prospect of a second do-or-die battle staged there 900 years after William The Conqueror triumphed in 1066.

This chilling document, which was compiled in the summer of 1940, contains reconnaissance photographs and maps and every town along the south coast. Pictured is an aerial view of Portsmouth, which was intended to reveal possible landing spots as well as targets for the Luftwaffe to bomb

 The bulky dossier is a stark reminder of how well prepared a German invading force would have been had the Luftwaffe not been rebuffed by the RAF in the Battle of Britain.

A black and white photograph of Bournemouth which was included in the Nazi invasion plan. The photographs sometimes give the uncanny impression of a vintage travel brochure, with one of the seaside town's famous donkeys appearing in this image. Indeed, the images were likely taken from tourist postcards

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

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

 It lays out the intelligence behind Operation Sea Lion -  Hitler's code name for an invasion of the United Kingdom during the Battle of Britain in the Second World War.

The bulky dossier is a stark reminder of how well prepared a German invading force would have been had the Luftwaffe not been rebuffed by the RAF in the Battle of Britain. The operation to invade Britain was known as Operation Sea Lion. Pictured is an illustrated map showing Falmouth in Cornwall

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

Palm Bay in Margate, which was a major destination for daytrippers looking to escape the city grime before the outbreak of World War Two

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

The document is incredibly comprehensive and detailed. They even had managed to collect information relating to the Electricity Board as no stone was left unturned in their preparations. Illustrated here is Weymouth in Dorset

 There is a large selection of black and white photos of seaside resorts and notable landmarks from Land's End in Cornwall to Broadstairs in Kent.

Women pick daffodils in the fields above the Cornish fishing town of Newlyn. The often idyllic photographs contrast with the chilling nature of the document

 These include Falmouth Bay, Studland Bay, Margate, Dartmoor, Eastbourne Pier and the White Cliffs of Dover.

Corfe Castle in Dorset, an unlikely military target for the Nazis but nonetheless and important landmark that could be used to guide bomber aircraft

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

Old Harry Rocks, three chalk formations, including a stack and a stump, at Handfast Point on the Isle of Purbeck in Dorset

 A picture of people using ropes to scale the cliffs at Saltdean near Brighton could have provided the template for a German attack at the same spot.  

The packs were sent to German headquarters' in western Europe in August 1940 in readiness for Operation Sea Lion - the German invasion of Britain. This picture of people using ropes to scale the cliffs at Saltdean near Brighton could have provided the template for a German attack at the same spot

 Other colour-coded geological maps show soil types in the land across southern England so the Germans knew which Panzer tanks could be used where.

Drawings of Beachy Head and Sleaford Head in Dorset, as well as other landscape features including Cuckmere, Willingdon Hill and Birling Gap

 They even had managed to collect information relating to the Electricity Board as no stone was left unturned in their preparations.

Ramsgate and its harbour, as depicted in the Nazi invasion plans, which offered views of all the towns on the southern English coast

 Four years later, the Allies issued similar style plans of the Normandy coast ahead of D-Day to prepare their men for the landings.

Four years after this document was produced, the Allies issued similar style plans of the Normandy coast ahead of D-Day to prepare their men for the landings. Seen here is a photograph of the sea front at Plymouth

 The German pack has been consigned for sale by a European private collector with C&T Auctions of Ashford, Kent, who expect it to fetch £350.

Genteel Sidmouth in Devon may seem an unlikely spot for a Nazi invasion, but it was among the many spots depicted in the invasion plan

 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.

Bournemouth's miles of sandy beaches were also mapped, presumably in case they could be used by landing craft like the Normandy Beaches were during D Day

 '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.

A Luftwaffe aerial photograph of Portland Bill in Dorset, one of the many coastal areas illustrated in the chilling collection

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

A colour map of Weymouth, presumably based on an Ordnance Survey original. Many are marked with circles and numbers drawn by military planners

Hitler prefaced his order for Operation Sea Lion by stating: 'As England, in spite of her hopeless military situation, still shows no signs of willingness to come to terms, I have decided to prepare, and if necessary to carry out, a landing operation against her.'

A street map of Southampton, which was a key port and held military installations a Nazi invasion force would have needed to neutralise

 But with air losses increasing, Hitler postponed Sea Lion indefinitely on September 17, 1940 and it was never put into action.

With air losses increasing, Hitler postponed Sea Lion indefinitely on September 17, 1940 and it was never put into action. Pictured is a geological map included in the collection, which goes up for auction tomorrow

 The sale takes place tomorrow. 

Britain's canal network, which was used to move industrial goods around the country. It's inclusion shows the incredible level of detail contained in the plans