A few connections:
Lady CHAPPLE is a great-granddaughter of John HILL (1842–1927), banker, by Elizabeth Llewellyn PALMER (1844–68), of the gentry family
LLEWELLEN-PALMER of Great Somerford (see BLG 1972), elder half-sister of Brig.-Gen. George Llewellen PALMER (1857–1932), C.B., E.D., M.P. for Westbury 1918–22, they being the children of Michael PALMER (1814–91), D.L., J.P., of Berryfield Hall (or House), Wiltshire.
https://en.wikipedia.org/wiki/George_Palmer_(British_Army_officer)https://daryledmonds.com/index.htm?ssmain=berryfield.htm;
The Brigadier-General had a son, Col. William LLEWELLEN PALMER, who married Lady Alexandra Augusta WYNN-CARINGTON, dau. of the 1st and last Marquess of LINCOLNSHIRE; and a daughter, Madelaine, who married (1st) Hon. Felix Charles Hubert HANBURY-TRACY, son of the 4th Baron SUDELEY, and (2ndly) Wing-Commander Caryl Liddell HARGREAVES, son of Alice Pleasance LIDDELL (known as the inspiration of Alice's Adventures in Wonderland) and scion of the RAVENSWORTH barons and STRATHMORE & KINGHORNE earls.
Lady CHAPPLE's elder sister, Geraldine Llewellen HILL (1925–2016), was married to Keith Ronald LAURENCE (1920–2001), son of Admiral Sir Noel Frank LAURENCE (1882–1970), K.C.B., D.S.O.
Lady CHAPPLE's descent from her great-grandparents is as follows:
John HILL (1842–1927), banker, m. (1st, 1867) Elizabeth Llewellyn PALMER (1844–68); m. (2ndly, 1870) Florence Jameson WATERLOW (1847–1900), dau. (by Isabella JAMESON) of Alfred James WATERLOW, elder brother of Sir Sydney Hedley WATERLOW, 1st Baronet, K.C.V.O., of the family of Waterlow and Sons, engravers.
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(By 1st marriage) Charles Llewellen John HILL (1868–1939), banker, m. (1st, 1896, div. 1908) Mabel Edith (1873–1945), dau. of Joseph Bartholomew TICKLE; m. (2ndly, 1909) Violet (1876–1958), the divorced wife of Frederick Page BARTON, and dau. of John Henry TAYLOR. (Violet was the mother, by her first husband, of Sheila BARTON who m. Major Norman Edwin BARTLETT, son of Sir Herbert Henry BARTLETT, 1st Baronet.)
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(By 1st marriage) John Basil Llewellen HILL (1897–1976), managing director of Hedges & Butler, wine merchants, m. (1925) Joan (1901–74), dau. of Ernest Edward LUCY (1861–1944).
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Mrs. LAURENCE and Lady CHAPPLE.