Priscilla Buchan, Baroness Tweedsmuir

The Right Honourable The Baroness Tweedsmuir of Belhelvie PC
Portrait by Madame Yevonde Taken 1967
Member of Parliament for Aberdeen South
In office 26 November 1946 – 30 March 1966
Prime Minister	Clement Attlee
Preceded by	Sir Douglas Thomson, Bt
Succeeded by	Donald Dewar
Personal details
Born	25 January 1915
Died	11 March 1978 (aged 63)
Political party	Scottish Conservative Party
Other political affiliations	Unionist Party (until 1965)
Spouse(s)	Maj. Sir Arthur Lindsay Grant (d.1944) The Lord Tweedsmuir (m.1948)

Priscilla Jean Fortescue Buchan, Baroness Tweedsmuir of Belhelvie, PC (née Thomson; 25 January 1915 – 11 March 1978) was a Unionist and Conservative politician.

The daughter of Brigadier Alan F. Thomson DSO, she married Major Sir Arthur Lindsay Grant, 11th Baronet, Grenadier Guards in 1934. He was killed in action in 1944. She subsequently married the author and politician, the 2nd Baron Tweedsmuir, in 1948.

Lady Tweedsmuir was an unsuccessful parliamentary candidate for Aberdeen North in July 1945, and was elected for Aberdeen South in 1946, holding the seat until 1966.

She was a delegate to the Council of Europe from 1950–1953, a UK Delegate to the General Assembly of the United Nations, 1960–1961; Joint Parliamentary Under-Secretary of State for Scotland from 1962–1964.

On 1 July 1970 she was created a life peer as Baroness Tweedsmuir of Belhelvie, of Potterton in the County of Aberdeen.

Tweedsmuir was Minister of State at the Scottish Office from 1970–1972 and at the Foreign and Commonwealth Office from 1972–1974 and was sworn of the Privy Council in 1974. In the House of Lords she served as Principal Deputy Chairman of Committees, 1974–1977 and as Chairman of the Select Committee on European Communities, 1974–1977. She was also a Deputy Speaker.