In the North, the letters u and y are occasionally pronounced /ɪ,iː/, the same as in the South, rather than /ɨ̞,ɨː/. This is usually the case when the preceding vowel is /ɪ/ or when y is preceded or followed by g/ɡ/ or followed by w/u/, forming a diphthong."Morffoleg y Gymraeg". Geiriadur yr Academi. Bangor University. Retrieved 25 July 2014.
