Geoffrey Leech is Research Professor in English Linguistics at Lancaster University. He is the author, co-author or co-editor of more than 20 books (most of them published by Longman) on Linguistics and the English Language.Paul Rayson is a Research Fellow in the Department of Computing, Lancaster University and has extensive experience of statistical corpus analysis and corpus annotation. Andrew Wilson is a Lecturer in Computer Corpus Linguistics at Lancaster University. He has been involved in corpus research since 1990 and has written several books, including Corpus Linguistics (1996, co-authored with Tony McEnery).