ɪn dʒˈænjuːˌɛɹi tˈuː θˈaʊzənd tˈɛn, ˈɔɪstɚ kˈɑːɹd wʌz fˈʊli ɹˈoʊld ˈaʊt əkɹˌɑːs nˈæʃənəl ɹˈeɪl sˈɜːvɪsᵻz ɪn lˈʌndən, ænd ˈɔɪstɚ pˈeɪæzjuːɡˌoʊ ɪz nˈaʊ vˈælɪd əkɹˌɑːs ðə hˈoʊl lˈʌndən ɹˈeɪl nˈɛtwɜːk, ɪŋklˈuːdɪŋ ðə fˈɔːɹmɚ "ˈɔn" sˈɪstəm.
In January 2010, Oyster card was fully rolled out across National Rail services in London, and Oyster pay-as-you-go is now valid across the whole London rail network, including the former "ON" system.