| Name | Year | Details |
| Godfrey Abbott | 1981 | Semi-finalist |
| Mike Abbott | 2005 | Semi-finalist |
| Viv Acious | 1996 | |
| Anne Adams | 1983 | |
| Linden Adams | 1991 | Semi-finalist |
| Roger Adams | 1995 | Semi-finalist |
| Martin Addyman | 1993 | |
| Shafi Ahmed | 1997 | |
| Akinade Ajayi | 1997 | |
| Akintunde Akinkunmi | 1997 | Semi-finalist |
| Roy Alcorn | 1978 | |
| Anthony Alder | 1990 | |
| Richard Aldous | 1986 | |
| James Alexander | 1990 | |
| Derek Allen | 1974 | |
| Graham Allen | 2005 | |
| Stephen Allen | 1991 | Champion |
| Jonathan Allum | 1978 | |
| Sheila Altree | 1980 | as Sheila Denyer |
| 1985 | Disqualified | |
| 1997 | Semi-finalist | |
| Angela Alves | 1977 | Semi-finalist |
| Cicely Anderson | 1991 | |
| Michael Anderson | 1986 | |
| Neville Anderson | 1972 | |
| Sonia Anderson | 1995 | |
| Martin Andrew | 1991 | |
| Graham Andrews | 1977 | |
| Mary Andrews | 1994 | |
| Joseph Angel | 1984 | |
| Daniel Appleby | 1973 | Semi-finalist |
| Peter Arbuthnott | 1981 | |
| E Archer | 1973 | |
| Christopher Argyle | 1994 | Semi-finalist |
| 2004 | ||
| Julie Aris | 2004 | |
| Drusilla Armitage | 1992 | Semi-finalist |
| Arthur Arnold | 1981 | |
| Lynne Ashcroft | 2003 | |
| Dulcie Ashdown | 1974 | |
| Kevin Ashman | 1987 | Semi-finalist |
| 1995 | Champion | |
| Anne Ashurst | 1997 | Champion |
| Margaret Askew | 1975 | Semi-finalist |
| Hilary Aslett | 1983 | |
| Ruth Atkin | 2004 | |
| Liz Atkinson | 1992 | Semi-finalist |
| Philip Atkinson | 1990 | Semi-finalist |
| Anthony Attree | 1987 | |
| Tim Austen | 2005 | |
| Erica Austin | 1980 | |
| Jim Averill | 2004 | |
| John Axon | 2004 |