24 - 1934: Robert Graves, I, Claudius
22 - 1934: Robert Graves, Claudius the God
19 - 1924: E. M. Forster, A Passage to India
1995: Christopher Priest, The Prestige
15 - 1984: Angela Carter, Nights at the Circus
2000: Zadie Smith, White Teeth
14 - 1984: J. G. Ballard, Empire of the Sun
12 = 2006: Cormac McCarthy, The Road
2009: A. S. Byatt, The Children's Book
11 = 1938: C. S. Forester, A Ship of the Line
1938: C. S. Forester, Flying Colours
1977: John le Carré, The Honourable Schoolboy
2005: Ian McEwan, Saturday
10 = 1952: Evelyn Waugh, Men at Arms
1956: Rose Macaulay, The Towers of Trebizond
9 = 1936: Winifred Holtby, South Riding
1981: Salman Rushdie, Midnight's Children
8 = 1928: Siegfried Sassoon, Memoirs of a Fox-Hunting Man
1982: Bruce Chatwin, On The Black Hill
2002: Jonathan Franzen, The Corrections
7 = 1948: Graham Greene, The Heart of the Matter
1996: Graham Swift, Last Orders
6 - 1981: Paul Theroux, The Mosquito Coast
5 = 1947: L. P. Hartley, Eustace and Hilda
1965: Muriel Spark, The Mandelbaum Gate
1967: Margaret Drabble, Jerusalem the Golden
4 = 1922: David Garnett, Lady into Fox; 1942: Arthur Waley, Translation of Monkey by Wu Cheng'en; 1990: William Boyd, Brazzaville Beach; 1992: Rose Tremain, Sacred Country; 1994: Alan Hollinghurst, The Folding Star; 1998: Beryl Bainbridge, Master Georgie
3 = 1929: J. B. Priestley, The Good Companions; 1933: A. G. Macdonell, England, Their England; 1939: Aldous Huxley, After Many a Summer Dies the Swan; 1953: Margaret Kennedy, Troy Chimneys; 1957: Anthony Powell, At Lady Molly's; 1959: Morris West, The Devil's Advocate; 1976: John Banville, Doctor Copernicus; 1979: William Golding, Darkness Visible; 1920: D. H. Lawrence, The Lost Girl
2 = 1921: Walter de la Mare, Memoirs of a Midget; 1931: Kate O'Brien, Without My Cloak; 1954: C. P. Snow, The New Men and The Masters; 1973: Iris Murdoch, The Black Prince; 1974: Lawrence Durrell, Monsieur: or, The Prince of Darkness
1 = 1919: Hugh Walpole, The Secret City; 1925: Liam O'Flaherty, The Informer; 1926: Radclyffe Hall, Adam's Breed; 1930: E. H. Young, Miss Mole; 1949: Emma Smith, The Far Cry; 1955: Ivy Compton-Burnett, Mother and Son; 1961: Jennifer Dawson, The Ha-Ha; 1971: Nadine Gordimer, A Guest of Honour; 1972: John Berger, G; 1989: James Kelman, A Disaffection; 1991: Iain Sinclair, Downriver; 2004: David Peace, GB84; 2008: Sebastian Barry, The Secret Scripture
0 = 1923: Arnold Bennett, Riceyman Steps; 1927: Francis Brett Young, Portrait of Clare; 1932: Helen de Guerry Simpson, Boomerang; 1935: L. H. Myers, The Root and the Flower; 1937: Neil M. Gunn, Highland River; 1940: Charles Morgan, The Voyage; 1941: Joyce Cary, A House of Children; 1943: Mary Lavin, Tales from Bective Bridge; 1944: Forrest Reid, Young Tom; 1945: L. A. G. Strong, Travellers; 1946: Oliver Onions, Poor Man's Tapestry; 1950: Robert Henriques, Through the Valley; 1951: Chapman Mortimer, Father Goose; 1958: Angus Wilson, The Middle Age of Mrs. Eliot; 1960: Rex Warner, Imperial Caesar; 1962: Ronald Hardy, Act of Destruction; 1963: Gerda Charles, A Slanting Light; 1964: Frank Tuohy, The Ice Saints; 1966: Christine Brooke-Rose, Such; 1966: Aidan Higgins, Langrishe, Go Down; 1968: Maggie Ross, The Gasteropod; 1969: Elizabeth Bowen, Eva Trout; 1970: Lily Powell, The Bird of Paradise; 1975: Brian Moore, The Great Victorian Collection; 1978: Maurice Gee, Plumb; 1980: J. M. Coetzee, Waiting for the Barbarians; 1983: Jonathan Keates, Allegro Postillions; 1985: Robert Edric, Winter Garden; 1986: Jenny Joseph, Persephone; 1987: George Mackay Brown, The Golden Bird: Two Orkney Stories; 1988: Piers Paul Read, A Season in the West; 1993: Caryl Phillips, Crossing the River; 1996: Alice Thompson, Justine; 1997: Andrew Miller, Ingenious Pain; 1999: Timothy Mo, Renegade, or Halo2; 2001: Sid Smith, Something Like a House; 2003: Andrew O'Hagan, Personality; 2007: Rosalind Belben, Our Horses in Egypt; 2010: Tatjana Soli, The Lotus Eaters; 2011: Padgett Powell, You and I; 2014: Zia Haider Rahman, In the Light of What We Know
I realise I meant to separate out the two C.P. Snow novels, but failed to do so; however I guess most people who have read one have read the other as well.
Thnaks for filling in the poll, and for excellent recommendations in comments.