Variation within the English language is a vast research area, of which dialectology, the study of geographic variation, is a significant part. This book explores grammatical differences between British English dialects, drawing on authentic speech data collected in over 30 counties. In doing so it presents a new approach known as 'corpus-based dialectometry', which focuses on the joint quantitative measurement of dozens of grammatical features to gauge regional differences. These features include, for example, multiple negation (e.g. don't you make no damn mistake), non-standard verbal-s...