{{one source|date=June 2025}} {{Use dmy dates|date=December 2023}} {{Infobox officeholder | honorific_prefix = | name = Lauchlan MacNeill Weir | honorific_suffix = MP | image = | caption = | office = Member of Parliament<br />for Clackmannan and Eastern Stirlingshire | term_start = 14 November 1935 | term_end = 18 August 1939 | predecessor = James Wellwood Johnston | successor = Arthur Woodburn | majority = | term_start1 = 15 November 1922 | term_end1 = 7 October 1931 | predecessor1 = Ralph Glyn | successor1 = James Wellwood Johnston | majority1 = | office2 = Parliamentary Private Secretary to the Prime Minister | alongside2 = Robert Morrison | prime_minister2 = Ramsay McDonald | predecessor2 = Charles Rhys | successor2 = Frank Markham, Ralph Glyn, John Worthington | term_start2 = 1929 | term_end2 = 1931 | office3 = Parliamentary Private Secretary to the Prime Minister | alongside3 = | prime_minister3 = Ramsay MacDonald | predecessor3 = Sidney Herbert | successor3 = Sidney Herbert | term_start3 = 1924 | term_end3 = 1924 | birth_name = Lauchlan MacNeill Weir | birth_date = 1877 | birth_place = | death_date = {{death date and age|1939|08|18|1887|df=yes}} | death_place = | education = | party = Labour | spouse = Margaret Gillison (m. 1913) | children = | relatives = | alma_mater = University of Glasgow | other_party = | occupation = Journalist }}

'''Lauchlan MacNeill Weir''' (1877–18 August 1939) was a Scottish Labour politician.

He was the son of Robert Weir and was educated at the University of Glasgow.{{citation needed|date=June 2025}} He worked as a journalist<ref name=westernmail>{{cite news |title=Obituary: Mr L. MacNeill Weir, Socialist "M.P. for the Highlands" |url=https://www.newspapers.com/image/814829820/?match=1&terms=Lauchlan%20MacNeill%20Weir |access-date=1 June 2025 |work=Western Mail & South Wales News |date=19 August 1939}}</ref> and first stood for parliament in Argyllshire in 1918, but was easily beaten by the Coalition Liberal.

He was elected MP for Clackmannan and Eastern Stirlingshire in the general election of 1922, lost his seat in the National Government landslide of 1931, but won it back in 1935,<ref name=westernmail /> holding on to it until his death in 1939.

MacNeill Weir was the Parliamentary Private Secretary to the first Labour Prime Minister Ramsay MacDonald from 1924 until 1931<ref name=westernmail /> and wrote a controversial book entitled ''The Tragedy of Ramsay MacDonald: A Political Biography'' published in 1938.

He married Margaret Gillison in 1913. There were no children.

He died on 18 August 1939.

== References == {{Reflist}}

== External links == * {{Hansard-contribs | mr-lauchlan-weir | MacNeill Weir }}

{{s-start}} {{s-par|uk}} {{s-bef | before = Ralph Glyn }} {{s-ttl | title = Member of Parliament for Clackmannan and Eastern Stirlingshire | years = 19221931 }} {{s-aft | after = James Wellwood Johnston }}

{{s-bef | before = James Wellwood Johnston }} {{s-ttl | title = Member of Parliament for Clackmannan and Eastern Stirlingshire | years = 19351939 }} {{s-aft | after = Arthur Woodburn }}

{{s-gov}} {{s-bef|before=Sir Sidney Herbert}} {{s-ttl|title=Parliamentary Private Secretary to the Prime Minister| years=1924}} {{s-aft|after=Sir Sidney Herbert}}

{{s-bef|before=Charles Rhys}} {{s-ttl|title=Parliamentary Private Secretary to the Prime Minister| years=1929–1931}} <br /> serving alongside Robert Morrison {{s-aft|after=Frank Markham, Ralph Glyn, John Worthington}}

{{s-end}}

{{Parliamentary Private Secretaries to the Prime Minister|state=autocollapse}} {{Authority control}}

{{DEFAULTSORT:Weir, Macneill}} Category:1877 births Category:1939 deaths Category:Scottish Labour MPs Category:Members of the Parliament of the United Kingdom for Scottish constituencies Category:Parliamentary private secretaries to the prime minister Category:UK MPs 1922–1923 Category:UK MPs 1923–1924 Category:UK MPs 1924–1929 Category:UK MPs 1929–1931 Category:UK MPs 1935–1945 Category:Alumni of the University of Glasgow

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