
Guardian Media Group, the publisher of The Guardian and Observer, is considering the radical changes as part of its plan to cut costs by 20% and break even within three years, according to .
The newspapers have been published in Berliner-style format since 2005, moving from the broadsheet format, and was introduced by former editor Alan Rusbridger.
A Guardian News & Media spokesperson said: "We don't comment on rumour or speculation."
A possible deal with Rupert Murdoch’s News UK would follow an industry-wide initiative to pool newspaper ad sales. That plan, known as Project Rio, was dealt a major blow last week after the Daily Mail pulled out.
±±¾©Èü³µpk10 broke the news that publishers were discussing joint ad sales last May as print ad revenues slumped by nearly 20% and advertisers shifted money into Facebook and Google.