Editing MI5 (section)

==Past names of the Security Service==
Although the Service is commonly referred to as 'MI5', this was its official name for only thirteen years (1916–1929). However, it is still used as a sub-title on the various pages of the official Security Service website, as well as in their web address (https://www.MI5.gov.uk).
*October 1909: founded as the '''Home Section of the Secret Service Bureau''';
*April 1914: became a sub-section of the War Office '''Directorate of Military Operations, section 5''' (MO5) — MO5(g);
*September 1916: became '''Military Intelligence section 5''' — MI5;
*1929: renamed the '''Defence Security Service''';
*1931: renamed the '''Security Service'''.

===Cover name===
MI5 has previously used '''Government Communications Planning Directorate''' (GCPD) as a cover name when sponsoring research related to drone usage in charging recording devices.<ref>{{Cite news |title=MI5 involvement in drone project revealed in paperwork slip-up |last=Sabbagh |first=Dan |work=The Guardian |date=6 March 2021 |url= https://www.theguardian.com/uk-news/2021/mar/06/mi5-involvement-in-drone-project-revealed-in-paperwork-slip-up}}</ref>