Western New England English
The English of Western New England in fact shows many sharp differences throughout rather than one uniform accent. In 2001, Charles Boberg, discussing that Western New England English was a likely direct influence on the Inland Northern English of the Great Lakes region, still identified as many as four or five English sub-regional accents within Western New England itself, based on data from the late 1990s:
Dialect levelling in Britain
Historical examples show that dialect levelling generally takes place anywhere and anytime in situations of extensive mobility and cultural and linguistic mixing. One historical example of dialect levelling is the change in the London dialect that took place in the fifteenth century when Northern county immigrants moved to London. Their dialect diffused into southern forms and some elements were incorporated into standard English (Milroy, 2002). Dialect levelling has become a widespread phenomenon in Britain. Southern features seem to be spreading throughout the whole country and typical vowel sounds seem to be centred on big cities like Glasgow, Manchester, or Newcastle (Kerswill, 2001).