For some du words, the Oxford Dictionary of English lists multiple British English pronunciations, i.e.:
- reduce: [rɪˈdjuːs], [rɪˈdʒuːs]
- arduous: [ˈɑːdjʊəs], [ˈɑːdʒʊəs]
- endure: [ɪnˈdjʊə], [ɛnˈdjʊə], [ɪnˈdʒɔː], [ɛnˈdʒɔː]
However, for other, similar words, the [dʒ] variant(s) is/are not listed:
- due: [djuː]
- produce: [prəˈdjuːs]
I have had a blanket pronunciation for most, if not all of these kind of words, off the cuff: the [dʒ] variant. Is [dʒ] an acceptable alternative to [dj] for those words where only [dj] is listed?