The relevant info
Is in this quote from the Guardian's piece on the matter:
"A senior BBC Wales drama source told MediaGuardian.co.uk that Mr Davies may be preparing to leave the show.
"Russell has always said that he wouldn't be with the show forever and he has made no secret that the hours are quite exhausting," the insider said.
"But there isn't any way it would be axed even if he left. He loves the show and he does feel that maybe it would benefit from some new blood.""
Not like the Sun to report complete crap now, is it?