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Action This Day was a 1941 memorandum sent to Winston Churchill personally, to advise Churchill that the
Bletchley Park Bletchley Park is an English country house and estate in Bletchley, Milton Keynes (Buckinghamshire) that became the principal centre of Allied code-breaking during the Second World War. The mansion was constructed during the years following ...
(BP) codebreaking establishment was short of staff in some critical areas. Their requirements were small, but as a small (and secret) organisation their management did not have priority. Four senior heads of sections ("Huts") and their deputies wrote to Churchill, who had visited "BP" on 6 September 1941, where he made a speech saying he appreciated their work. The memo was signed by
Alan Turing Alan Mathison Turing (; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher, and theoretical biologist. Turing was highly influential in the development of theoretical c ...
and Hugh Alexander (head and deputy head of
Hut 8 Hut 8 was a section in the Government Code and Cypher School (GC&CS) at Bletchley Park (the British World War II codebreaking station, located in Buckinghamshire) tasked with solving German naval (Kriegsmarine) Enigma messages. The section was l ...
); and
Gordon Welchman William Gordon Welchman (15 June 1906 – 8 October 1985) was a British mathematician. During World War II, he worked at Britain's secret codebreaking centre, "Station X" at Bletchley Park, where he was one of the most important contributors. ...
and
Stuart Milner-Barry Sir Philip Stuart Milner-Barry (20 September 1906 – 25 March 1995) was a British chess player, chess writer, World War II codebreaker and civil servant. He represented England in chess both before and after World War II. He worked at Bletchl ...
(head and deputy head of
Hut 6 Hut 6 was a wartime section of the Government Communications Headquarters#Government Code and Cypher School (GC&CS), Government Code and Cypher School (GC&CS) at Bletchley Park, Buckinghamshire, UK, Britain, tasked with the solution of German A ...
). The four were known as the "Wicked Uncles".


Churchill and Bletchley Park

Winston Churchill had been interested in military intelligence from the First World War. He called Bletchley Park '"the geese who laid the golden eggs and never cackled". When he became Prime Minister he asked in September 1940 through his personal assistant Desmond Morton to see "all the ENIGMA messages" every day. Even in 1940 this was not possible, and he was sent "Headlines" with a précis plus copies of some messages from Hut 3 and Hut 4 and a sample of diplomatic cable intercepts or "Blue Jackets". They were sent with a note from "C" (
Stewart Menzies Major General Sir Stewart Graham Menzies, (; 30 January 1890 – 29 May 1968) was Chief of MI6, the British Secret Intelligence Service (SIS), from 1939 to 1952, during and after the Second World War. Early life, family Stewart Graham Menzies wa ...
) each morning in a red box, which was placed on his bed (Menzies) or desk (Morton). He tended to use them "as a stick to beat his generals, rather than acknowledging the often vague and complex intelligence it actually represented". In April 1942 Churchill acknowledged that his figures for Rommel's tank numbers from decrypts only referred to certain areas not to the overall number in North Africa; he had been urging action on
Auchinleck Auchinleck ( ; sco, Affleck ;
gd, Achadh nan Leac
. For the next seven months he did not use Western Desert decrypts (although he still wanted to replace Auchinleck with
Alexander Alexander is a male given name. The most prominent bearer of the name is Alexander the Great, the king of the Ancient Greek kingdom of Macedonia who created one of the largest empires in ancient history. Variants listed here are Aleksandar, Al ...
). Churchill visited Bletchley Park on 6 September 1941, escorted by
Edward Travis Sir Edward Wilfred Harry Travis (24 September 1888 – 23 April 1956) was a British cryptographer and intelligence officer, becoming the operational head of Bletchley Park during World War II, and later the head of GCHQ. Career Educated local ...
. Welchman had been told by Travis to prepare a short speech and started by saying he wanted to make three points. The tour was behind schedule; after Welchman covered two points Travis said "That’s enough, Welchman". Churchill (who was enjoying himself ) said "I think there was a third point, Welchman" and gave him "a grand schoolboy wink". When Churchill went into
Hut 8 Hut 8 was a section in the Government Code and Cypher School (GC&CS) at Bletchley Park (the British World War II codebreaking station, located in Buckinghamshire) tasked with solving German naval (Kriegsmarine) Enigma messages. The section was l ...
his path was blocked by
Shaun Wylie Shaun Wylie (17 January 1913 – 2 October 2009Conel Hugh O'Donel Alexander Conel Hugh O'Donel Alexander (19 April 1909 – 15 February 1974), known as Hugh Alexander and C. H. O'D. Alexander, was an Irish-born British cryptanalyst, chess player, and chess writer. He worked on the German Enigma machine at ...
; he was "nonplussed" by the apparent chaos with two senior codebreakers both sitting on the floor and studying papers.
John Herivel John is a common English name and surname: * John (given name) * John (surname) John may also refer to: New Testament Works * Gospel of John, a title often shortened to John * First Epistle of John, often shortened to 1 John * Second ...
was introduced as the man beginning the continuous breaking of the vitally important "Red" key; Churchill gave Herivel a "deep penetrating look, not a very friendly look, more of a scowl". Herivel wrote that "it was a miserably dark day with a cold wind . We saw before us a rather frail, oldish looking man, a trifle bowed, with wispy hair, in a black pin-striped suit with a faint red line, no bravado, no large black hat, no cigar. Then he spoke very briefly, but with deep emotion .... That was 'our' finest hour at Bletchley Park". Then Churchill spoke to the codebreakers from a mound of builder's rubble at the end of
Hut 6 Hut 6 was a wartime section of the Government Communications Headquarters#Government Code and Cypher School (GC&CS), Government Code and Cypher School (GC&CS) at Bletchley Park, Buckinghamshire, UK, Britain, tasked with the solution of German A ...
in front of the house, saying with deep emotion "how grateful he was to us for all the good work we were doing in the war effort". He said to them "To look at you, one would not think you knew anything secret". Others e.g. those on late shifts were very disappointed to miss him. When he was leaving he said to Stewart Menzies] or to
Alastair Denniston Commander Alexander "Alastair" Guthrie Denniston (1 December 1881 – 1 January 1961) was a Scottish codebreaker in Room 40, deputy head of the Government Code and Cypher School (GC&CS) and hockey player. Denniston was appointed operational hea ...
: "I know I said not to leave no stone unturned to get staff, but I didn't expect you to take me literally (or seriously)."


Content of memo

The memo was drafted by Welchman. It detailed three areas where a few extra staff would remove bottlenecks. They said they did not want to be seen as criticising Commander
Edward Travis Sir Edward Wilfred Harry Travis (24 September 1888 – 23 April 1956) was a British cryptographer and intelligence officer, becoming the operational head of Bletchley Park during World War II, and later the head of GCHQ. Career Educated local ...
, who had done his utmost to help them. The memo was headed ''Secret and Confidential: Prime Minister only, Hut 6 and Hut 8, 21st October 1941''. and signed: :We are, Sir, Your obedient servants, :A.M. Turing :W.G. Welchman :C.H.O’D. Alexander :P.S. Milner-Barry


Breaking of Naval Enigma (Hut 8)

The Hollerith Section under Mr Freeborn had to stop working night shifts because of staff shortages and overworking of his present team. Hence finding of the naval keys was delayed for at least twelve hours every day. He needed at least twenty more untrained Grade III women clerks. There was now also a danger that skilled male staff in his section and with ''BTM'' (the
British Tabulating Machine Company __NOTOC__ The British Tabulating Machine Company (BTM) was a firm which manufactured and sold Hollerith unit record equipment and other data-processing equipment. During World War II, BTM constructed some 200 " bombes", machines used at Bletchle ...
at
Letchworth Letchworth Garden City, commonly known as Letchworth, is a town in the North Hertfordshire district of Hertfordshire, England. It is noted for being the first garden city. The population at the time of the 2011 census was 33,249. Letchwort ...
) would be called up for military service.


Military (i.e. Army) and Air Force Enigma (Hut 6)

Much wireless traffic in the Middle East, including some with “Light Blue” intelligence, could not be picked up by local intercept stations. Owing to fatigue of the present decoding staff it could not all be decoded, But all that was needed was about twenty trained typists.


Bombe testing (Hut 6 and Hut 8)

Shortage of
WRENS Wrens are a family of brown passerine birds in the predominantly New World family Troglodytidae. The family includes 88 species divided into 19 genera. Only the Eurasian wren occurs in the Old World, where, in Anglophone regions, it is commonly ...
from the Royal Navy had not delayed output from BP, but it meant that Hut 6 & 8 staff needed for other jobs had to do the ''
bombe The bombe () was an electro-mechanical device used by British cryptologists to help decipher German Enigma-machine-encrypted secret messages during World War II. The US Navy and US Army later produced their own machines to the same functiona ...
'' testing for ''stories'' themselves.


Result

Milner-Barry went by train from Bletchley to Euston; there was only a wooden barrier and one policeman at the entrance to Downing Street. He rang the bell of 10 Downing Street and was admitted, saying he had an important secret and confidential letter to deliver in person to the Prime Minister. He gave the memo to
George Harvie-Watt Sir George Steven Harvie-Watt, 1st Baronet, QC, TD, DL, FRSA (23 August 1903 – 18 December 1989) was a British barrister and Conservative Party politician. Harvie-Watt studied at George Watson's College in Edinburgh, then at the Unive ...
, Churchill's
Parliamentary Private Secretary A Parliamentary Private Secretary (PPS) is a Member of Parliament (MP) in the United Kingdom who acts as an unpaid assistant to a minister or shadow minister. They are selected from backbench MPs as the 'eyes and ears' of the minister in the H ...
, who agreed to show it to Churchill and stress its urgency.: Milner-Barry had been chosen to deliver the memo as the '"most expendable'" member of the quartet. Churchill read it and added his red label ''ACTION THIS DAY'', He gave it to his chief military assistant General
Hastings Ismay Hastings Lionel Ismay, 1st Baron Ismay (21 June 1887 – 17 December 1965), was a diplomat and general in the British Indian Army who was the first Secretary General of NATO. He also was Winston Churchill's chief military assistant during the ...
to action, endorsing it. :::::"Make sure they have all they want on extreme priority and report to me that this has been done" Milner-Barry met
Alastair Denniston Commander Alexander "Alastair" Guthrie Denniston (1 December 1881 – 1 January 1961) was a Scottish codebreaker in Room 40, deputy head of the Government Code and Cypher School (GC&CS) and hockey player. Denniston was appointed operational hea ...
in the corridor some days later, who '"made some wry remark about our unorthodox behaviour, but he was much too nice a man to bear malice" Then
Stewart Menzies Major General Sir Stewart Graham Menzies, (; 30 January 1890 – 29 May 1968) was Chief of MI6, the British Secret Intelligence Service (SIS), from 1939 to 1952, during and after the Second World War. Early life, family Stewart Graham Menzies wa ...
appeared at BP, he was '"very cross" and personally rebuked Welchman for violating the chain of command. The situation at BP began to improve, with staff requirements given "extreme priority" and on 18 November Menzies reported to Churchill that "every possible measurement was being taken, and BP’s needs were being very rapidly met, although all of the new arrangements were not yet in place". Milner-Barry noticed that "All that we did notice was that almost from that day the rough ways began miraculously to be made smooth". More resources flowed; the Ministry of Labour met Denniston and Menzies to consider favourably the codebreaker's needs. The service chiefs agreed to supply more clever young men, and to expand to the Y service to provide more coverage. Orders for many more
bombe The bombe () was an electro-mechanical device used by British cryptologists to help decipher German Enigma-machine-encrypted secret messages during World War II. The US Navy and US Army later produced their own machines to the same functiona ...
s were placed with BTM, and a new “bombe” outstation was opened at Gayhurst Manor, north of Bletchley. The Royal Navy supplied more Wrens to run the bombes, who were given their own trade "Special Duties X". Treasury rules that departments requesting extra staff should have a Treasury expert investigate whether existing staff could be used more efficiently were dropped.


Other Action This Day missives

Churchill used his red ''Action this Day'' tags to attach to memos that he wished ministers to action immediately, This led his private secretary John Peck to put out a spoof memo with the red tag and with Churchill's forged initials. It fooled several of Churchill's entourage in late 1941: Desmond Morton, Ian Jacob, Eric Seal and Pug Ismay (illustrating the degree of demands which Churchill's staff were used to!): *Special offices were to be set up for the Prime Minister (to be ready in three day's time) at Selfridge's department store, in the Archbishop's home at Lambeth Palace, at RAF Stanmore, at the London Palladium and in the London suburbs of Tooting Bec and Mile End Road. Each was to have accommodation for Mrs Churchill and Nelson the cat, two shorthand typists, three secretaries, and'' a place for me to watch air-raids from the roof''.


Notes


References


Sources

* * * * * * * * * * * * (published in the US by McGraw-Hill, 1982)


Further reading

* New edition with addendum by Welchman correcting his misapprehensions in the 1982 edition.


External links


Alan Turing, Gordon Welchman, Hugh Alexander, Stuart Milner-Barry. Letter to Winston Churchill (1941)
''{{webarchive , url=https://web.archive.org/web/20230608205005/https://www.maths.ed.ac.uk/~v1ranick/turingletter.pdf , date=8 June 2023'' 1941 documents Bletchley Park Winston Churchill