Free daily Metro has confirmed that is increasing its circulation by 250,000 copies. The extra distribution will be in place from 1 October and will give Metro a total print run of 1.35 million.
Some 200,000 extra copies will be distrbuted in London and an extra 50,000 will go outside the capital.
New stations to start receiving Metro include: Epsom, Stevenage, Colchester, Chelmsford and Milton Keynes.
The long-anticipated news is likely to put further pressure on paid-for tabloid newspaper circulations in the South East.
Two weeks ago, The Sun tried to counter the effect of free newspapers on its circulation by cutting its price to 20p and employing street vendors in London.