The short monophthongs

LOT

There is some variation, with RP standard [ɒ] used by some speakers on occasion, but the general tendency is towards unrounding to [a]. In monosyllabic words ending in [g], such as fog and dog, a certain number of speakers articulate a lengthened diphthong [oʊ], analagous to the pronunciation of vogue. This doesn’t appear widespread, and is generally considered by the speakers themselves as amusingly parochial, and is probably an archaism that was much more prominent in the past. A diphthong quality also appears with [e] before /g/. Evidence that this is a related archaism could be taken from the fact that one of the common, and therefore historical, family names on St Helena is Legg, pronounced by the local radio station interviewer as [leɪg], whereas in his everyday speech he would not use such a realization.