Britain has contributed immensely to the world. Here's a non-exhaustive list:
Engineering: Steam engine (Thomas Newcomen), Iron Bridge (Abraham Darby III), Rocket locomotive (George Stephenson), hovercraft (Christopher Cockerell), jet engine (Frank Whittle).
Technology: World Wide Web (Tim Berners-Lee), penicillin (Alexander Fleming), telephone (Alexander Graham Bell), Turing machine (Alan Turing), DNA structure (Watson & Crick with Rosalind Franklin).
Arts: Paintings by J.M.W. Turner & David Hockney; music by The Beatles & Benjamin Britten; theater like Shakespeare's plays & modern works by Harold Pinter.
Poetry: Works by William Wordsworth, John Keats, T.S. Eliot, Geoffrey Chaucer, Dylan Thomas.
Novelists: Charles Dickens, Jane Austen, George Orwell, J.R.R. Tolkien, Virginia Woolf.