Ah! Perhaps the marriage did take place after all, but ended in divorce?
The Times, Wednesday, Jun 27, 1934; pg. 1; Issue 46791; col A
Marriages
"Shand-Kydd : Greathed - On June 22, 1934, at Marylebone Town Hall, Rowland Shand-Kydd, youngest son of W. Shand-Kydd and the late Mrs Shand-Kydd, of Highgate, to Mrs Patricia Greathed"
Marriage Registration
Rowland S KYDD
Patricia L. GREATHED
June quarter 1934
Marylebone 1a 1411
Lenore/Patricia is also listed as Patricia L. DORRINGTON in the Index, so both her names appeared in the marriage certificate.
The Times, Thursday, Jan 31, 1957; pg. 10; Issue 53753; col E
Will and Bequests
"Shand-Kydd, Mrs Patrick [sic] Leonore, of Harpsden, Henley-on-Thames, wife of Lieutenant Colonel Rowland Shand-Kydd, company director (gross £58,637)(duty paid, £18,131)"
Death Registration
KYDD, Patricia L.S. (age 50)
December quarter 1956
Henley vol 6b page 858
Other tidbits...
Rowland Shand Kydd was a director of Shand Kydd Ltd. So was his brother Norman.
Rowland appears to have remarried in 1960 to Ursula Georgina Hardman.
There was also the announcement of the engagement of Michael Anthony Hordern and Michele Burnett in March 1972. Curiously, the prospective groom was described as the younger son of Mr L A Hordern (Cane End House, Berkshire) and Mrs Rowland Shand Kydd.
I wonder if Mr L A Hordern was a former husband of Leonore/Patricia?