Historical Dictionary of British Intelligence

D NOTICE• 129

and was particularly effective in London, where its personnel suc-

ceeded in identifying and exploiting the Czech origins of sources

such as Nicholas Prager and Sir Barnett Stross, MP. Thedefections

ofFrantisek AugustandJosef Frolikin 1969, both experienced

StB officers with firsthand knowledge of operations in England, pro-

videdMI5with an unprecedented window into the organization.

–D–

D DIVISION.(1) The wartimeMI5section responsible for port secur-
ity and travel control headed by Colonel John Adam. D Division was
subdivided into:

• D1(a), responsible for exit and military permits, headed by Captain
  W. S. Mars


• D4(b), responsible for port intelligence, headed by Colonel C. H.
  Burne


• D4(c), responsible for port security, headed by Commander Burton


• D4(d), responsible for visas, headed by Commander Cazalet


• D4(e), responsible for liaison with the Home Office and Passport
  Office, headed by Colonel John Adam


• D4(l), based at MI5 headquarters in London

(2) The cover-name for thedeceptionunit in Lord Louis Mountbat-

ten’s Far East command during World War II, headed byPeter

Fleming.

D NOTICE.A voluntary censorship scheme restricting the news media
in Britain from making disclosures that might damage British na-
tional security. Introduced in 1912, the system identifies specific top-
ics upon which editors are requested to seek advice before publishing
information that might compromise British secrets.
In 1971 the system was consolidated into 12 D Notices: Notices
1–7 deal with military information that might be of use to an enemy,
8 covers the identification of civil defense sites, 9 deals with radio
and radar transmission, 10 requests secrecy for the identities ofMI5
andSecret Intelligence Servicepersonnel, 11 protects codes and ci-