ɐɡˈɛn, ɐkˈoːɹdɪŋ tʊ ɪnnˈɛs fˈɜːɡəsən, tˌiːˈɛf ˈɛlz mˈiːdiəmtˈɜːm ˌæspɚɹˈeɪʃən ɪz fɚðə fˈɔːɹmɚ təbi ɛkspˈændᵻd tə kˈʌvɚɹ ˈʌðɚ nˈæʃənəl ɹˈeɪl sˈɜːvɪsᵻz ɪn lˈʌndən ænd ðə sˈaʊθˈiːst, ˈiːðɚ baɪ dᵻɹˈɛkt tˌiːˈɛf ˈɛl ˌɑːpɚɹˈeɪʃən θɹuː ɐ kənsˈɛʃənhˈoʊldɚ æz wɪððɪ ˈɛkssˈɪlvɚlˌɪŋk ɹˈaʊts ɔːɹ baɪ ɐ tˌiːˌoʊsˈiː ɐɡɹˈiːɪŋ tʊ ˈɑːpɚɹˌeɪt ˌʌndɚ ðə lˈʌndən ˌoʊvɚɡɹˈaʊnd "bɹˈænd".
Again, according to Innes Ferguson, TfL's medium-term aspiration is for the former to be expanded to cover other National Rail services in London and the South-East, either by direct TfL operation through a concession-holder (as with the ex-Silverlink routes) or by a TOC agreeing to operate under the London Overground "brand".