Channel 4 chief executive Andy Duncan said at an Ofcom seminar that the as-yet-to be named channel would include original material, as well as extensive archive footage of shows like 'Dispatches'.
Duncan also announced that Channel 4 is to "double the amount it spends on 'public service' internet sites", which he revealed was currently in the low millions.
It is still undecided whether the service will be free or whether users may have to pay a small subscription fee.
The move is part of Channel 4's wider game plan to restore thought provoking and intelligent documentaries like 'The Boy Whose Skin Fell Off' to its schedule. The move to do so has been stepped up in the wake of recent criticisms from past Channel 4 executives, including former chairman Vannie Treves, about its "crap programmes", with 'Big Brother' cited as one example.
At the Ofcom seminar, Duncan also touched on the £100m a year shortfall in the lead up to digital switchover and continued to lobby the government for funding to help diffuse the impact of commercial station proliferation in the wake of the end of merger talks with Five last month.
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