Based on BLG 1965, the 'Giana' mentioned above is Georgiana Luke (b. 1945), dau. of Jane Lane's younger sister (all four of whom bore the name 'Jane' as their final Christian name [as was the case with her father's sisters, the name only appearing intermittently however in previous generations]; as the eldest, her name appears simply to have been 'Jane', as above), Lettice Georgina [n.b.- both BLG 1965 and the National Archives-
https://discovery.nationalarchives.gov.uk/details/r/C10301513 - indicate this to have been her second name, as opposed to 'Georgiana', which given her daughter's name might be expected] Jane Lane (1911-[seemingly alive at the time of her ex-husband's death in 1995; his previous ex-wife was noted to be deceased in his Independent obituary]); she was wife of (m. 1937, div.) Richard Whitling Crawshaw, then (m. 1945, div.) Maj. Peter Ambrose Cyprian Luke (1919-1995), M.C., The Rifle Brigade, a writer, editor, and producer, inc. for ABC TV and the B.B.C. [s. of the Colonial Office official Sir Harry Charles Luke, K.C.M.G.]. Georgiana Luke's brother, Henry Rupert Charles Luke (b. 1946) was noted to be deceased in his father's Independent obituary.
The following articles give detail on Georgiana Luke's marriage to Tom Ferguson, of Gubbeen Farm (the family produces award-winning cheeses), West Cork, their son Fingal (married to Ciara Putz, with four sons) and daughter Clovisse (this spelling per the articles, contrary to the notice above; search results seem split). Mention of the connection to Sir Harry Luke is also made.
EDIT- Georgiana 'Luke' rather than 'Lane', of course.