Influential Writers
Excluding the traditional pre-20th. Century English canon:
Poets
Louis MacNeice, W.H.Auden, Stephen Spender, Dylan Thomas, Thomas Hardy, Robert Frost, Gavin Bantock - inevitably, D.H.Lawrence and T.S.Eliot, though it's no longer the fashion to credit either of them. I could add a lot more!
Prose Writers
D.H.Lawrence, Christopher Isherwood, Edward Upward, Graham Greene, Aldous Huxley, Patrick White, Muriel Spark, Graham Swift, Gore Vidal...The list goes on, but George Orwell's '1984' seems particularly appropriate reading in Blair's Britain!