The lands of the Bletchley Park estate were part of the Manor of Eaton included in the Domesday Book in 1086. Browne Willis built a mansion there in 1711, but this was taken down by Thomas Harrison, who had acquired the property in 1793. The estate was first known as Bletchley Park during the ownership of Samuel Lipscomb Seckham, who purchased it in 1877.The estate and manor was sold on 4 June 1883 to Sir Herbert Samuel Leon (1850–1926), a financier and Liberal MP Leon expanded the existing farmhouse into the present mansion.

The style of the architecture is a mixture of Gothic Victorian, Tudor and Dutch Baroque and was the subject of  many chats from those who worked there, or visited, during World War II. Leon's estate covered 581 acres (235 ha), of which Bletchley Park occupied about 55 acres (22 ha)..

In 1938 the site was sold to a builder, who planned to demolish the mansion and build an estate. Before the demolition could take place, Admiral Sir Hugh Sinclair (Director of Naval Intelligence and head of MI6) bought the site. To cover their real purpose, the first government visitors to Bletchley Park described themselves as "Captain Ridley's shooting party".

Bletchley Park and the estate was conveniently located within easy walking distance of Bletchley railway station, where the "Varsity Line" between the cities of Oxford and Cambridge – whose universities supplied many of the code-breakers – met the (then-LMS) main West Coast railway line between London and Birmingham, Manchester, Glasgow. Starting in 1938, Post Office Telephones laid dedicated cables, for numerous telephone and telegraph circuits, from the nearby repeater station at Fenny Stratford (on Watling Street, the main road linking London to the north-west, later to be designated the A5).

Enigma was a portable communication typewriter like /digital computer used in thhe second world war used to relay morse code and position the enemy. It was small compared to the goliath sized computer collossus which was also used to relay morse code. Collossus was like what can only compared as a server. Collossus was found in Poland before the breakout of war on september 1939. Evidence suggests that it was based on english design from the forward technology of the computer device that Charles Babbage made in the 20s. Collossus was found in parts then shipped to bletchley park during the war. The collossus or goliath device too heavy and it needed to be smaller for easy transport so it inspiredt the portable enigma device which was one of the first digital computers. The design was fantastic and as of the radio device it was able to tag position of U boats in the atalantic. The problem was tracking the u boats the double ss or ß was'nt on the english enigma device, this could track the u boats more easily. It was a strike of genius from the codebreaker Alan Turing to fix it. Thsi in turn won the battle of the atlantic.

Alan Turing was a genius oxford mathermaetician who figured out the enigma cod. This could properly pin-point the positions of the afforementioned U boats and and ranked German officers, bletchley park found out where they were, that won the war. It was strategically essential as the germans and the axis powers knew attracted the whereabouts of the allied forces.

Bletchley park was nearly bombed. (find dates)A bomb nearly landed on the park but landed on the nearby Bletchley railway station. The Germans never got another chance to bomb the park as afterwards it was more highly fortified. The only way that the Nazi Germans could attack was from the air in the end. The underpass bridge at the railway station was made to restructure the crator that was left that broke the track. The transportation of goods was essential and supplies to bletchley park were interupted by the bombing. Its an example that Southern milton keynes was bombed when the second world war was occuring.

Bletchley park was mostly populated with the royal navywomens service or WRENs devoted to figuring the enigma code. At the end of the war 300.000 personel were positioned at Bletchley Park working alongside the Allies.

Concluding Bletchley Park is an important part of milton keynes history from the time it was built in 1711 to the present day. It is an important part of Secklow Milton Keynes history it is important that a place like this must never be lost..