
Channel 4 has in turn revealed details of three planned stations, E4 Radio, Channel 4 Radio and Pure4, that would go on its own network if successful.
But in a statement of clarification released less than an hour after the bids were submitted to Ofcom, Channel 4 said: "The three proposed Channel 4 branded radio stations unveiled today are exclusive to the 4 Digital Group bid.
"There have been no conversations between Channel 4 and NGW and there is no guarantee that the stations will launch if 4 Digital Group's application for the second national multiplex is unsuccessful."
A spokesman added: "We do not recognise the descriptions of the two Channel 4 radio stations in NGW's bid - they bear little relation to any of our three proposed services and are entirely NGW's creation, prepared without consulting Channel 4."