ˈæftɚ sˈɛvɹəl jˈɪɹz ʌv ˈɪmplɪməntɪŋ pɹɪskɹˈɪptɪv ɹᵻnˈuːəbəl pˈɑːlɪsiz lˈaɪk ðə mˈɜːtən ɹˈuːl, jˌuːkˈeɪ bˈʌɹoʊz ɹˈiːəlaɪzd ðeɪ hæd ɐ pɹˈɑːbləm wɪð kˈiːpɪŋ tɹˈæk ʌv wʌt ɹᵻnˈuːəbəl ɪkwˈɪpmənt hɐdbɪn ɪnstˈɔːld ænd wˈɛðɚ ðə tˈɛn pɚsˈɛnt tˈɑːɹɡɪt wʌz ˈæktʃuːəli bˌiːɪŋ mˈɛt.
After several years of implementing prescriptive renewable policies like the Merton Rule, UK boroughs realized they had a problem with keeping track of what renewable equipment had been installed – and whether the 10% target was actually being met.