The foot–strut vowel split, which has its origins in 17th century English, is notable for its absence from the speech of Northerners in England, where stood–stud remain homophones – both are pronounced with the same vowel /ʊ/. The present study analyses the speech of 122 speakers from Manchester in the North West of England. Although the vast majority of speakers exhibit no distinction between the foot and strut lexical sets in minimal-pair production and judgement tests, vowel height is correlated with socio-economic status: the higher the social class, the lower the strut vowel. Surprisingly, statistical models indicate that vowel class is a significant predictor of foot–strut in Manchester. This means that, for a speech community without the split, there remains an effect in the expected direction: strut vowels are lower than foot vowels in the vowel space. We suggest that co-articulatory effects of surrounding consonants explain this instrumental difference, as they have significant lowering/heightening effects on the acoustics but are not fully captured by our statistical model. We argue that the perplexing nature of the historical split can be partially accounted for in this data, as the frequency of co-occurring phonetic environments is notably different in foot than in strut, resulting in cumulative effects of co-articulation. We also present evidence of age grading which suggests that middle class speakers may develop a phonetic distinction as they age.

The pronunciation of the bath vowel is a salient feature of English varieties of the southwest of England, yet neither the status of the trap–bath split in traditional dialects nor ongoing change today is well understood. After reviewing the existing literature, we investigate the quality and length of low unrounded vowels in Bristol English on the basis of sociolinguistic interviews with twenty-five speakers. The picture suggested by these data is complex: there is evidence for a traditional length-only trap–bath split, for a length and backness split diffusing from the east and for a merger diffusing from the north. Some of these changes involve lexical diffusion, especially with loanwords and other distinctive lexical groups. Overall, the rich and contradictory data speak to the contested sociolinguistic status of these variables and to the need to examine individual patterns of variation closely to gain a full understanding of them.

Koineization – the development of a new, mixed variety following dialect contact – has well-documented outcomes. However, there have been few studies of the phenomenon actually in progress. This article describes the development of a new variety in the English New Town of Milton Keynes, designated in 1967. The article is structured around eight “principles” that relate the process of koineization to its outcomes. Recordings were made of 48 Milton Keynes-born children in three age groups (4, 8, and 12), the principal caregiver of each child, and several elderly locally born residents. Quantitative analysis of ten phonetic variables suggests that substantial but not complete focusing occurs in the child generation. The lack of linguistic continuity in the New Town is demonstrated, and the time scale of koineization there is discussed. Finally, it is shown that demography and the social-network characteristics of individuals are crucial to the outcomes of koineization.