The Restoration of Bletchley Park

“The work here at Bletchley was no optional extra; no engaging very British sideshow; it was utterly fundamental to the survival of Britain and to the triumph of the West and I’m not actually sure that I can think of very many places where I could say something as unequivocal as that. This is sacred ground. If this isn't worth preserving, what is?”

SAVING THE SITE FOR THE NATION

“…I walked despondently out of a Council meeting, where… it had been decided that Bletchley Park should be demolished to make way for houses, a petrol station and a small supermarket…

We asked BT, who owned the Park, if we could hold a “farewell reunion” …for the wartime codebreaking staff to say “Thank you” for their magnificent achievements. ...we invited reporters ... to hear at first hand and then broadcast to the nation this almost unbelievable story. It worked! From then on it was simply uphill all the way.

I now often just stand and look, sometimes in disbelief, at the old, sad wartime huts gleaming in their coats of fresh paint, the grounds being restored to their wartime layout; Block B standing high and proud; groups of visitors and schoolchildren listening intently to guides telling the BP story; and everywhere; staff and volunteers hurrying about their business, and I think to myself,

                                 ” Wescombe, we actually made it”.”

Peter Wescombe, volunteer and founding member of the Bletchley Park Trust

THE RESTORATION PROJECT

In 2014  the Bletchley Park Trust completed the long awaited £8-million Heritage Lottery Funded (HLF) first-phase restoration programme.  



This exciting and innovative project has seen the transformation of the formerly derelict Codebreaking buildings: Block C into a vibrant visitor centre with new introductory exhibition, and the iconic but once derelict Codebreaking Huts 3 and 6 into exhibition spaces that allow visitors to experience how it was to work at Bletchley Park during World War 2.

View of Codebreaking Huts, 2014-07, From the collection of: Bletchley Park
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Areas of landscape have been returned to their wartime character with car parks removed and 'lost' codebreaking Huts discovered. An external soundscape provides visitors the opportunity to overhear period ambient noises and further allows the visitor to be drawn back into the 1940s.

The buildings are designated as part of the Collection with the significance of artefacts and every effort was made to retain as much original fabric as possible. Where replacement was required new material was sourced that was an exact match as shown through the rare wartime photographs of Block C, or was a wartime contemporary from another source.

Alongside the HLF project the Bletchley Park Trust has also restored other iconic buildings: Hut 11 is now a sensory exhibition that allows visitors to explore what it was like for WRNS (Wrens) to work on the Bombe machines, and work on Huts 1 & 11A continues.

BLOCK C

Block C in 2012, 2012-10-01, From the collection of: Bletchley Park
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Block C in 2012, 2012-10-01, From the collection of: Bletchley Park
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Block C prior to restoration, 2013-04-05, From the collection of: Bletchley Park
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Block C, 2012, prior to removal of post war internal walls and restoration. View from spur 7 through to spur 9 Block C, 2012. Spur 8 ceiling

Block C during restoration, 2013-06-13, From the collection of: Bletchley Park
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Block C, 2013, during restoration. The post war internal walls have been removed and the original granolithic floor has been revealed

Crittall windows waiting for remedial conservation, 2013-07-18, From the collection of: Bletchley Park
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Original Crittall windows awaiting restoration

Block C wartime radiators awaiting restoration, 2013-06-13, From the collection of: Bletchley Park
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Original cast iron column radiators awaiting restoration 

Original First Aid point, 2013-06-13, From the collection of: Bletchley Park
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Original 1942 First Aid Post discovered after the removal of post war walls. The damage was caused when the later internal walls were added. This has now been fully restored to original condition

Paint analysis of Block C - RSJs, From the collection of: Bletchley Park
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Paint analysis of Block C RSJ (rolled steel Joist) beams

“Although the decoration of the buildings at Bletchley was undertaken within 'living memory' it is surprising how information becomes confused over time. Most of our ideas of how buildings were decorated at this period come from post war magazines and media, some of which was in black and white. Our recollection and perception therefore does not always reflect the reality of how things appeared.”

Neilian (Ian) C. Crick-Smith PACR NCCR Principal Conservator Researcher & CoFounder

Block C wartime acoustic ceiling tiles prior to conservation, 2013-05-04, From the collection of: Bletchley Park
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Block C ceiling tiles, 2013-07-18, From the collection of: Bletchley Park
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Wartime acoustic ceiling tiles prior to remedial conservation Original acoustic ceiling tiles after remedial conservation

Block C housed a number of codebreaking sections that used machinery that was noisy. Acoustic ceiling tiles were used to help reduce the noise from escaping and disturbing those working in other sections in Block C and the surrounding buildings.

Approximately 5,500 original tiles were salvaged and these have been conserved and then repositioned within Block C within the exhibition areas in spurs 4, 6, 7 and 9.

Around 8,000 new tiles were sourced for the remaining areas within Block C and these are a perfect match for the original wartime tiles.

INTERPRETIVE APPROACH TO BLOCK C

As the wartime buildings are designated as part of the Collection, they have been treated as artefacts in their own right. 

The look and feel of the Bletchley Park introductory exhibition responds to the look and feel of the building in the 1940s. 

Displays are placed where there were once desks, each focusing on a particular aspect or process and using a combination of graphics, object display and multimedia to convey the story. 

Furniture is based on that seen in the photographs of the Block taken at the end of the war.

Freeborn Punch Room and Verifier bay, Block C, 1945, From the collection of: Bletchley Park
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Block C prior to restoration, 2013-12-17, From the collection of: Bletchley Park
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Block C, 1945. Freeborne Punch Room and Verifier Bay

Introductory exhibition film projected onto Block C walls, 2014-07-02, From the collection of: Bletchley Park
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Visitors watching part of the introductory exhibition film that is projected directly onto the restored wartime fabric of Block C

Block C interpretation, 2014-12-08, From the collection of: Bletchley Park
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Hollerith files in the Freebornery, 1945, From the collection of: Bletchley Park
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Block C, 1945.  Hollerith Files in the Freebornery

HUT 3

Hut 3 during restoration, 2013-09-11, From the collection of: Bletchley Park
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Hut 3, 2013. Restoration in progress

“If work to restore [the Huts] had begun just one year later, they could have been lost to the nation altogether.” 

Rob Davies, Site Manager Fairhurst Ward Abbotts (FWA)

Hut 3 during restoration showing the double-pitched roof on the south end. 

The  surviving blast walls have been removed in order to underpin correctly and rebuild.

Repairs to Hut 3 roof, 2013-09-11, From the collection of: Bletchley Park
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Hut 3, 2013. Roof repairs

Roof repairs to Hut 3, 1939/1945, From the collection of: Bletchley Park
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Wartime repairs to the roof of Hut 3. Carpenter Bob Watson is pictured

Hut 11A Time Capsule, Bill Haydon, Bob Watson and Vic Watson, 1942-01-30, From the collection of: Bletchley Park
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'Time capsule' discovered inside a Hut 11a door

“The paint analysis was able to identify exactly how certain areas of the Huts were painted originally, what treatments were specific to each area and how some differed. 

This is significant as it enables us to understand how the buildings were used; the paint colours, types and finishes that were applied. These of course have a direct effect on how the interiors feel and passing on that 'feeling' to the modern visitor is a vital and integral element of truly experiencing this site.”



Neilian (Ian) C. Crick-Smith PACR NCCR Principal Conservator Researcher & CoFounder

Paint analysis of Hut 3 exterior, From the collection of: Bletchley Park
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Hut 3 exterior paint analysis cross section

“Had the work not been done before the wind storms in January [2014], the Huts would probably have been reduced to piles of rubble....we were amazed that the Huts were still standing. In some places they seemed to be levitating because all the sole plates had rotted away. Considering the heavy rain and high winds we have had, I would have thought, after that, they would probably have fallen down.”

Rob Davies, Site Manager Fairhurst Ward Abbotts (FWA)

Huts 3 & 6 undergoing restoration, 2013-09-11, From the collection of: Bletchley Park
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Construction of temporary scaffolding roof, 2013.  Huts 3 (left) and 6 (right). (Hut 1 far right)

INTERPRETIVE APPROACH TO THE HUTS



An immersive and emotive approach has been taken with the interpretation of Huts 3 and 6. Visitors need to imagine what happened here during the war as due to the ‘Top Secret’ nature of the work little evidence survives relating to these buildings other than a few Veteran recollections and the buildings themselves. There are no wartime photographs showing the layout of the Huts.

Hut 3 restoration, 2014-06, From the collection of: Bletchley Park
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Hut 3 'The Watch' after restoration and set-dressing

Hut 6 restoration, 2014-06, From the collection of: Bletchley Park
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Hut 6 'The Intercept Control Room' after restoration and set-dressing

Interpretation is focussed on bringing back the atmosphere and telling specific stories in the places where they occurred: Externally Huts 3 and 6 have been restored to their wartime condition; walls have been repainted in the original palette and the blast-walls have been reconstructed. Internally, the rooms have been repainted and the paint has been ‘aged’ by a scenic-artist. Rooms are set-dressed to 1940 – 1941 using furniture, stationary, clothing, and machines that were used during the period. Blackout blinds have been reintroduced and period lighting installed. An audio track and projected figures undertaking wartime activities provide visitors with further reference points.

HUT 6

Temporary scaffolding roof over Huts 3 & 6, 2013-11-04, From the collection of: Bletchley Park
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Underneath the temporary scaffolding roof; Hut 3 (left) and Hut 6 (right) 

Hut 6 prior to restoration, Elle Dunn, 1939/1945, From the collection of: Bletchley Park
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The fragile instability of Hut 6 prior to restoration

Hut 6 external walls being repaired, 2013-08-21, From the collection of: Bletchley Park
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Hut 6, 2013. External walls undergoing restoration: The beams were all numbered in order for them to be relocated to their original positions

Hut 6 central corridor prior to restoration, 2013, From the collection of: Bletchley Park
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Hut 6 central corridor prior to restoration

Hut 6 Floorboard Repairs, 2013-09-11, From the collection of: Bletchley Park
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Hut 6 Floor, 2013-08-29, From the collection of: Bletchley Park
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Hut 6 replacement floorboards from Fawley Court, 2013-10-10, From the collection of: Bletchley Park
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Hut 6 new floor joists being laid The floorboards in Hut 6 had deteriorated beyond the point of conservation and restoration Replacement floorboards for Hut 6 from wartime Huts at Fawley Court

Floorboards from historic Fawley Court, used as a Military Intelligence school during World War 2, were donated to Bletchley Park. These wartime boards from temporary Huts have provided BPT with like-for-like replacement boards for those which had rotted beyond repair.



Fawley Court also donated around fifty square metres of shiplap boarding for use on the deteriorated exterior of Huts 3 and 6.

Paint analysis of Hut 6 - exterior cladding, From the collection of: Bletchley Park
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 Hut 6 exterior cladding paint analysis cross section

Paint analysis of Hut 6 - entrance door, From the collection of: Bletchley Park
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Hut 6 exterior door undergoing restoration, 2013-09-26, From the collection of: Bletchley Park
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Hut 6 entrance door paint analysis cross section  Hut 6 entrance door undergoing restoration; where possible all original fabric has been retained

“The paint colours reflect their appearance originally - not aged as we often see them now - so to our perception may appear brighter than expected. However, we should remember that the Huts were blacked out and so maximum use was made of the low light levels available. The colours used were inexpensive and based upon those readily available at the time. The colour palette comes out of that previously used for service areas in large houses and interiors of workshops and factory spaces.”



Neilian (Ian) C. Crick-Smith PACR NCCR Principal Conservator Researcher & CoFounder

WARTIME DOCUMENTS DISCOVERED

Hut 6 roof void, 2013-09-11, From the collection of: Bletchley Park
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Hut 6 roof void where wartime documents were discovered

Wartime documents from Hut 6, 2013-10-04, From the collection of: Bletchley Park
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Wartime documents discovered in the roof void of Hut 6

Wartime documents from Hut 6, 2013-11-13, From the collection of: Bletchley Park
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Discovered items ready for remedial conservation

In 2013 during the restoration of Hut 6 the builders discovered a number of original documents within the roof void. 

These documents have now undergone conservation treatment and appear to all date to 1940 or 1941. The most exciting are two partial Banbury Sheets and a Blist.

Most are fragmented sections of larger documents that relate to early codebreaking methods and the majority appear to have been reused as scrap paper with notes written on the reverse.

"As I peered into the box of apparent 'rubbish' I felt honored to be the one to reveal their secrets…it could have been any one of those Codebreakers who last saw these documents....and now I was going to look at them, it made my body tingle all over!... I could often make neither head nor tail of their contents, but even so, I would be so careful to retain every element of originality, however 'insignificant' it may seem...”

Louise Drover Paper Conservator

Banbury Sheet, From the collection of: Bletchley Park
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Wartime Banbury Sheet

Blist dated 15/4/1940, From the collection of: Bletchley Park
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'Blist' dated 15/4/1940 

“It is interesting that the dates [of these documents] appear to be in winter months when the temptation to scrunch up a bit of waste paper and stuff it into a crack to keep out a draught would have been at its greatest.”

Codebreaker Sir Arthur Wilfred 'Bill' Bonsall KCMG CBE

Washtub Frocks, From the collection of: Bletchley Park
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'Washtub Frocks' Fashion article

LANDSCAPE & ARCHAEOLOGY

Water Hall, 1718, From the collection of: Bletchley Park
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Water Hall 1718 Survey

Remains of Water Hall, 2014, From the collection of: Bletchley Park
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In-situ brickwork 

EARLIER  MANSION DISCOVERED

During trench work on the large Oval in 2014 a small section of brickwork was discovered that is believed to be part of the foundations for Water Hall, the earlier eighteenth century mansion that used to occupy the Bletchley Park site. 



Due to the importance of the trees on the Oval and the fact that a number of these have Tree Preservation Orders (TPO's) it was considered not appropriate to fully excavate the area where the brickwork was uncovered at this time.

Car park removal, 2013, From the collection of: Bletchley Park
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'Rediscovery' of Huts 2 & 9 underneath later car park

'LOST' HUTS REDISCOVERED

During the removal of a car park adjacent to the Mansion the archaeological remains of Huts 2 and Hut 9 were discovered. These Huts were constructed in 1939 but after the war they became derelict and were demolished in 1986.

The outlines of these Huts have now been marked out with pebbles and interpreted with an external panel.

FOUNDATIONS OF BLOCK F LOCATED

Block F was demolished in 1987 and large parts of this site are now under a modern housing estate that is still being developed. During recent work the partial foundations of this building were discovered by the developers.



In World War 2 Block F housed the Colossus machines. Colossus was the world’s first semi-programmable computer which helped to speed up the breaking of the Lorenz cipher used by Hitler to communicate with his generals.

Block F, Spurs X, W and V, 1980, From the collection of: Bletchley Park
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Foundations for Block F, 2014-10-23, From the collection of: Bletchley Park
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Block F, 1980.  Spurs X, W & V Block F foundations

FUTURE RESTORATION



The Bletchley Park Trust has a vision to become a world class museum and heritage site. The first phase of restoration was successfully completed in May 2014.  





The Trust's long term ambition is to tell the myriad aspects of the Bletchley Park story using the assets to hand: the collections, the buildings and the site itself and is currently planning the next phase of restoration to realise this ambition.

Credits: Story

Role—Gillian Mason, Curator

Credits: All media
The story featured may in some cases have been created by an independent third party and may not always represent the views of the institutions, listed below, who have supplied the content.
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