The arrangement with Paul Rogers was never intended to be permanent. The collaboration was always viewed as having a limited time.
So after the release of the Cosmos rocks album as well as a European tour the working relationship was dissolved. Paul Rogers has indicated that he would be happy to work with the band began on a one-off basis perhaps for a charity eventss.
Duing press interviews hel in November 2009 Roger Taylor indicated during a number of press interviews that there had been a falling out between Brian and Paul. Apart from this comments on Roger know why the information has surfaced on this.