TWO top secret Second World War dossiers containing invasion and counter invasion plans for Dorset have gone under the hammer.

The documents outlining Hitler’s plans to invade Dorset in Operation Sealion and the Allies D-Day plans went head to head as bidders competed to own a piece of history.

The documents went under the hammer last week with a guide price of £300- £500.

Operation Sealion eventually sold for £6,800 plus commission.

The D-Day dossier went for £550 with a telephone bidder from the south east eventually making the winning bid.

The sale of historical documents took place at Mullock’s auction house in Shropshire.

Richard Westwood-Brookes, historical documents expert at Mullock’s, said: “The D-Day dossier is worth its weight in gold in providing vital information on the build up to the greatest military invasion in history.

“It was issued by the Officer Commanding the Hampshire and Dorset District and is dated Longford Castle, Salisbury, April 1944, just two months before the great day. It provides the vital administrative information which made D-Day possible, because it dealt with all the logistics of how you organise, transport and look after a vast army of men and machinery.

“Without doubt it will provide scholars with a vital insight into how in effect the allies succeeded in the invasion of Normandy.

“It is rare to say the least to find documents of this historical importance.

“D-Day, will, after all, go down in history as important an event as Waterloo and Trafalgar.”

The Nazi’s Operation Sealion plans or Militargoegraphiscke Angaben Uber England Sudkuste show detailed plans of how the Germans planned to take over Britain by invading Lyme Bay.

Other areas in the UK named in the 446 page document suggest the Isle of Wight, Brighton, Folkestone and Ramsgate as possible invasion landing sites.

But the invasion dream failed after the Luftwaffe lost the Battle of Britain to the RAF in 1940. The counter-invasion D-Day plans set in motion by the Allies, were so secret that only personnel on a need to know basis were told about them.

They were discovered during a house clearance on the south coast recently Inside the dossier marked ‘top secret’ is logistical information about how to transport invading troops to Northern France and how to keep them fed and watered while they were there.