The Sun's political editor Tom Newton Dunn has tweeted:
The FT, Guardian and Indy have not signed up to rival Royal Charter - but want to keep talking.
More top news
Here is the letter sent by the broadcasters to Prime Minister David Cameron's office in relation to the planned TV leaders debates.
Machete-wielding armed robbers tied up staff and customers of a north Manchester pub during a terrifying raid.
The South African Salvation Army has used a picture of a dress that sent the web into meltdown to raise awareness about domestic violence.