Question: Which founding member of the Conservative Philosophy Group was a former Conservative Member of Parliament in the United Kingdom (1974–97), and a former Cabinet minister?

Context articles: Lakshman Senewiratne
Kenneth Baker, Baron Baker of Dorking
Jonathan Aitken
Nimal Siripala de Silva
Bossom baronets
Gamini Jayawickrama Perera
Boyle baronets
Conservative Philosophy Group
Sajith Premadasa
J. E. B. Seely, 1st Baron Mottistone

Lakshman Pinto Jayatilaka Senewiratne (born 9 March 1957) (known as "Lakshman Senewiratne") is a Sri Lankan politician, current State Minister of Science, Technology and Research and a member of the Parliament of Sri Lanka representing the Badulla District.
 and former Cabinet Minister of Sugar Industries, His father Capt. C. P. J. Senewiratne was a MP for Mahiyangana electorate and former Cabinet Minister of Labour in the government of J.R. Jayewardene.
Kenneth Wilfred Baker, Baron Baker of Dorking, (born 3 November 1934) is a British politician, a former Conservative Member of Parliament and cabinet minister and a life member of the Tory Reform Group.
Jonathan William Patrick Aitken (born 30 August 1942) is a former Conservative Member of Parliament in the United Kingdom (1974–97), and a former Cabinet minister.
 He was convicted of perjury in 1999 and received an 18-month prison sentence, of which he served seven months.
 He is currently president of Christian Solidarity Worldwide.
 Aitken was also a member of the Privy Council of the United Kingdom.
Nilenthi Nimal Siripala de Silva MP (born 6 September 1944) is Sri Lanka's Cabinet Minister of Transprt in 15th Parliament of Sri Lanka.
 He is a member of the Sri Lanka Freedom Party and a Member of Parliament representing the Badulla District.
 He was also the former Leader of the Opposition, former Cabinet Minister (Irrigation and Water Resources Management), former Leader of the House.
The Bossom Baronetcy, of Maidstone in the County of Kent, is a title in the Baronetage of the United Kingdom.
 It was created on 4 July 1953 for the architect and Conservative Member of Parliament for Maidstone, Alfred Bossom.
 In 1960 he was further honoured when he was created a life peer as Baron Bossom, "of Maidstone in the County of Kent".
 The life peerage became extinct on his death in 1965 while he was succeeded in the baronetcy by his second but only surviving son, the second holder of the baronetcy.
 He was a former Conservative Member of Parliament for Leominster.
Mallawa Arachchige Gamini Jayawickrama Perera, MP, is a Sri Lankan politician and a member of the 15th Parliament of Sri Lanka representing Kurunegala.
 He is currently the Cabinet Minister of Sustainable Development and Wildlife and Minister of Buddha Sasana .
He was the former Cabinet Minister of Food Protection.He was elected as the chairman of ESCAP (Economic and Social Commission for Asia and the Pacific)in April 2016.
He was also the Chairman of United National Party (UNP) and the former Cabinet Minister for Irrigation and Water Management.
The Boyle Baronetcy, of Ockham in Salehurst in the County of Sussex, is a title in the Baronetage of the United Kingdom.
 It was created on 14 December 1904 for Edward Boyle a barrister, businessman and Conservative Member of Parliament for Taunton.
 His grandson, the third Baronet, was also a Conservative Member of Parliament and ultimately cabinet minister serving as Minister of Education from 1962 to 1964.
 He was made a life peer as Baron Boyle of Handsworth, of Salehurst in the County of Sussex, in 1970 and became Vice-Chancellor of the University of Leeds in the same year.
 The life peerage became extinct on his death in 1981 and he was succeeded in the baronetcy by his younger brother, the fourth Baronet.
 As of 2010 the title is held by the latter's eldest son, the fifth Baronet, who succeeded in 1983.
The Conservative Philosophy Group (CPG) was formed in the UK in 1974 by Sir Hugh Fraser, a Conservative MP, to provide an intellectual basis for conservatism at a time when the Conservative Party had just lost two general elections and elected a new leader, Margaret Thatcher.
 It was founded with four board members: Fraser, Roger Scruton, John Casey, and Jonathan Aitken MP.
Sajith Premadasa (Sinhala : සජිත් ප්‍රේමදාස, Tamil : சஜித் பிரேமதாச) (born 12 January 1967) is a Sri Lankan politician, a working committee member, Deputy Leader of the United National Party (UNP), the government party of Sri Lanka and Member of Parliament for Hambantota District and was the former cabinet minister of samurudi affairs and a Deputy Minister of Health in Sri Lanka.
 He is the son of the martyred Ranasinghe Premadasa the former President of Sri Lanka.
 Premedasa was appointed as the Cabinet Minister of Housing and Samurdi by President Maithripala Sirisena on 13 January 2015.
 After the 2015 General Election victory of the United National Party Premadasa was appointed Minister for Housing and Construction.
Major General John Edward Bernard Seely, 1st Baron Mottistone (31 May 1868 – 7 November 1947) was a British Army general and politician.
 He was a Conservative Member of Parliament (MP) from 1900 to 1904 and a Liberal MP from 1904 to 1922 and from 1923 to 1924.
 He was Secretary of State for War for the two years prior to the First World War, before being forced to resign as a result of the Curragh Incident.
 As General Jack Seely, he led one of the last great cavalry charges in history at the Battle of Moreuil Wood on his war horse Warrior in March 1918.
 Seely was a great friend of Winston Churchill and the only former cabinet minister to go to the front in 1914 and still be there four years later.