| | | Awards & Nominations for Individual Works |
| TITLE | AWARD | STATUS | YEAR | | NOT FOR AN AGE | Observer Short Story Prize | Winner | 1955 | | TRADESMAN'S EXIT | Observer Short Story Prize | Winner | 1956 | | THE HOTHOUSE SERIES | Hugo Best Short Story | Winner | 1962 | | THE SALIVA TREE | Nebula Best Novella | Winner | 1965 | | MAN IN HIS TIME | Nebula Best Short Story
| Nominee | 1966 | | Hugo Best Short Story | Nominee | 1967 | | TOTAL ENVIRONMENT | Nebula Best Novellette | Nominee | 1968 | | Hugo Best Novellette | Nominee | 1969 | | THE MOMENT OF ECLIPSE | British Science Fiction Award | Winner | 1972 | | BILLION YEAR SPREE | British Science Fiction Special Award | Winner | 1974 | | Eurocon III Merit Award | Winner | 1976 | | NON-STOP | Prix Jules Verne (Sweden) | Winner | 1976 | | SCIENCE FICTION ART | Cometa d'Argento (Italy) | Winner | 1977 | | ENEMIES OF THE SYSTEM | Hugo Best Novella | Nominee | 1979 | | HELLICONIA SPRING | Nebula Best Novel | Nominee | 1982 | British Science Fiction Best Novel
| Winner | 1983 | Locus Best Novel
| Nominee | 1983 | John W. Campbell
| Winner | 1983 | British Science Fiction Best Novel
| Nominee | 1984 | | Kurd Lasswitz Award for Best Foreign Novel | Winner | 1984 | | HELLICONIA SUMMER | SF Chronicle Best Novel | Nominee | 1984 | | Locus Best Novel | Nominee | 1984 | | HELLICONIA WINTER | Nebula Best Novel | Nominee | 1985 | | British Science Fiction Best Novel | Winner | 1986 | | Locus Best Novel | Nominee | 1986 | | SF Chronicle Best Novel | Nominee | 1986 | | THE PALE SHADOW OF SCIENCE | Hugo Best Non-Fiction | Nominee | 1986 | | Locus Best Non-Fiction | Nominee | 1986 | | TRILLION YEAR SPREE | Hugo Best Non-Fiction | Winner | 1987 | | Locus Best Non-Fiction | Winner | 1987 | | J. Lloyd Eaton Memorial Award | Winner | 1988 | | BURY MY HEART AT W.H. SMITH'S | Locus Best Non-Fiction | Nominee | 1991 | | Hugo Best Non-Fiction | Nominee | 1991 |
| AWARD OR CITATION | YEAR | | Special Citation, runner up in "Most Promising New Author" category, 17th World Science Fiction Convention | 1959 | | Special Citation as "Britain's Most Popular Science Fiction Author", British Science Fiction Association | 1964 | | Guest of Honour, 23rd World Science Fiction Convention, London | 1965 | | Special Citation as "Britain's Most Popular Science Fiction Author", British Science Fiction Association | 1969 | | Ditmar Award (Australia), World's Best Contemporary Science Fiction Writer | 1969 | | James Blish Award for Excellence in Criticism | 1977 | | Pilgrim Award, for lifetime contributions to the study of science fiction, Science Fiction Research Association | 1978 | | Guest of Honour, 37th World Science Fiction Convention, Brighton | 1979 | | Distinguished Scholarship Award, International Association for the Fantastic in the Arts | 1986 | | Master of Ceremonies, 45th World Science Fiction Convention, Brighton | 1987 | | President's Award, World SF | 1988 | | Elected Fellow of the Royal Society of Literature | 1989 | | Elected Grand Master by Science Fiction Writers of America | 2000 | | Awarded OBE for 'services to literature' | 2005 |
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