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In my opinion the speaker speaks quite estuary language, for example, "flogged it", "bust of Shakespeare", "booze and fags", "beater or blighter", and "ma". These are all slang terms from the three poems, and show the speaker is speaking of quite a low-average register of language. By the speaker's socialect, we can tell that she could be from a working class or middle class background.
To conclude, I think the poems are well structured, have much deeper meanings than most people realise, and that they do go into the morally wrong aspects of human nature.