What is Robert Armstrong, Baron Armstrong of Ilminster?
{{Infobox officeholder | honorific-prefix = [[The Right Honourable]] | name = The Lord Armstrong of Ilminster | image = Official portrait of Lord Armstrong of Ilminster crop 2.jpg | honorific_suffix = {{post-nominals|country=GBR|size=100%|GCB|CVO}} | office = [[Lord Temporal]] | term_start = 26 February 1988 | term_end = 3 April 2020 | office2 = [[Principal Private Secretary to the Prime Minister]] | primeminister2 = [[Edward Heath]]<br>[[Harold Wilson]] | term_start2 = 1970 | term_end2 = 1975 | predecessor2 = [[Alexander Isserlis]] | successor2 = [[Kenneth Stowe]] | office3 = [[Under-Secretary of State for the Home Department|Permanent Secretary]] of the <br /> [[Home Office]] | primeminister3 = [[James Callaghan]] | term_start3 = 1977 | term_end3 = 1979 | predecessor3 = [[Sir Arthur Peterson]] | successor3 = [[Brian Cubbon]] | office4 = [[Cabinet Secretary]] | primeminister4 = [[Margaret Thatcher]] | term_start4 = 1979 | term_end4 = 1987 | predecessor4 = [[John Hunt, Baron Hunt of Tanworth|Sir John Hunt]] | successor4 = [[Sir Robin Butler]] | office5 = [[Civil Service (United Kingdom)#Head of the Home Civil Service|Head of the Home Civil Service]] | primeminister5 = [[Margaret Thatcher]] | term_start5 = 1981 | term_end5 = 1987 | predecessor5 = [[Sir Douglas Allen]] | successor5 = [[Sir Robin Butler]] | birth_place = | death_date = {{death date and age|df=y|2020|4|3|1927|3|30}} | death_place = | restingplace = | birthname = Robert Temple Armstrong | birth_date = {{birth date|df=y|1927|03|30}} | nationality = British | party = [[Crossbench]] | spouse = | relations = [[Sir Thomas Armstrong]] (father) | children = | residence = | alma_mater = | occupation = | profession = | cabinet = | committees = | portfolio = | religion = | signature = | website = }} '''Robert Temple Armstrong, Baron Armstrong of Ilminster''', {{postnominals|country=GBR|size=100%|sep=,|GCB|CVO}} (30 March 1927 &ndash; 3 April 2020) was a British [[Lord Temporal]] and former civil servant. From 1970 to 1975 he was the [[Principal P