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The Welsh party leaders say they want the review of S4C's future to be comprehensive
The leaders of the four main parties in Wales have written a joint letter to Prime Minister David Cameron calling for an independent review of S4C.
Carwyn Jones, Ieuan Wyn Jones, Nick Bourne and Kirsty Williams said "political stewardship of S4C has been insufficiently vigilant."
The Department of Culture, Media and Sport (DCMS) has said funding S4C will pass almost entirely to the BBC.
The Wales Office said the UK government was committed to an independent S4C.
In the letter obtained by BBC Wales the leaders of Welsh Labour, Plaid Cymru, the Welsh Conservatives and Welsh Liberal Democrats say they want the review to be comprehensive.
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They also say they believe that the term of office of the current S4C Authority, which has been blamed for much of the recent problems, should end after the review has been completed with a new governance structure.
They said the review should ensure that S4C remains independent as a Welsh publisher-broadcaster.
BBC correspondents said it was "extremely significant" that the leaders of the Welsh Tories and Lib Dems had joined the leaders of Welsh Labour and Plaid in writing to Mr Cameron.
But a Wales Office spokesman said: "The government is committed to the future of Welsh language programming and to the future of S4C as an independent entity.
"We believe the best way to ensure S4C offers the best possible service to its audience while also securing its future is through a new funding arrangement involving the BBC.
"The Wales Office will continue to work with S4C and the DCMS to ensure the interests of Welsh language broadcasting are taken fully into account."
S4C said it had nothing to say about the letter as it was a matter for politicians.
Meanwhile, Welsh Office Minister David Jones has met members of Cymdeithas yr Iaith Gymraeg (the Welsh Language Society) to discuss the future of the channel.
The society is is calling for people to refuse to pay the TV licence fee unless the independence of S4C is guaranteed.
Mr Jones said during the meeting he sought to address some of the society's concerns, highlighting that the new arrangement will secure the future of the channel.
This article is from the BBC News website. © British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.
The Welsh party leaders say they want the review of S4C's future to be comprehensive The leaders of the four main parties in Wales have written a joint letter to Prime Minister David Cameron calling for an independent review of S4C.
Carwyn Jones, Ieuan Wyn Jones, Nick Bourne and Kirsty Williams said "political stewardship of S4C has been insufficiently vigilant."
The Department of Culture, Media and Sport (DCMS) has said funding S4C will pass almost entirely to the BBC.
The Wales Office said the UK government was committed to an independent S4C.
In the letter obtained by BBC Wales the leaders of Welsh Labour, Plaid Cymru, the Welsh Conservatives and Welsh Liberal Democrats say they want the review to be comprehensive.
Related stories
They also say they believe that the term of office of the current S4C Authority, which has been blamed for much of the recent problems, should end after the review has been completed with a new governance structure.
They said the review should ensure that S4C remains independent as a Welsh publisher-broadcaster.
BBC correspondents said it was "extremely significant" that the leaders of the Welsh Tories and Lib Dems had joined the leaders of Welsh Labour and Plaid in writing to Mr Cameron.
But a Wales Office spokesman said: "The government is committed to the future of Welsh language programming and to the future of S4C as an independent entity.
"We believe the best way to ensure S4C offers the best possible service to its audience while also securing its future is through a new funding arrangement involving the BBC.
"The Wales Office will continue to work with S4C and the DCMS to ensure the interests of Welsh language broadcasting are taken fully into account."
S4C said it had nothing to say about the letter as it was a matter for politicians.
Meanwhile, Welsh Office Minister David Jones has met members of Cymdeithas yr Iaith Gymraeg (the Welsh Language Society) to discuss the future of the channel.
The society is is calling for people to refuse to pay the TV licence fee unless the independence of S4C is guaranteed.
Mr Jones said during the meeting he sought to address some of the society's concerns, highlighting that the new arrangement will secure the future of the channel.
This article is from the BBC News website. © British Broadcasting Corporation, The BBC is not responsible for the content of external internet sites.