Three cousins who contributed to the programme.
Countess Mountbatten of Burma:

Lady Kennard:

Lady Butter:

Anyone know exactly how Ladies Kennard and Butter are related to Philip?
Neither Lady Kennard nor her sister Lady Butter are cousins of Prince Philip, but friends of his youth. Both are the nieces of Nada, Countess of
Milford Haven, wife of Prince Philip's maternal uncle George Mountbatten 2nd Marques of Milford Haven.
They are the daughters of Sir Harold Wernher (16 January 1893 – 30 June 1973) and his wife Anastasia (Zia) de Torby (9 September 1892 - 7 December 1977), the eldest daughter of Grand Duke Michael Mikhailovich Romanov. Zia was the elder sister of Nada.
They had three children:
George Michael Alexander Wernher (22 August 1918 – 4 December 1942), killed, aged 24, in Béja, Tunisia on active service.
Georgina Wernher (b. 17 October 1919) who married Lt.-Col. Harold Phillips and had several children, including Alexandra Hamilton, Duchess of Abercorn and Natalia Grosvenor, Duchess of Westminster.
After her husband's death in 1980 she married Sir George Arnold Ford Kennard, 3rd Bt. (1915–1999) in 1992.
Myra Alice Wernher (b. 8 March 1925) who married Sir David Henry Butter and had several children, including Maralyn Ramsay, Countess of Dalhousie.
Regards,
Gabriella