Labour says it has received a letter from Daily Mail group chairman Lord Rothermere that repeats the Mail on Sunday apology, but he says he does not believe it reflected the culture and practices at the papers.
It does not deal with the Ralph Miliband article.
Both the Editor and owner of the Mail on Sunday have apologised for a reporter intruding on a private memorial for Ed Miliband's uncle.
Ed Miliband has written to the Daily Mail's chairman Lord Rothermere to complain about a reporter attending his uncle's memorial service.
The PCC said it had received 384 complaints by 4pm on Wednesday relating to Daily Mail articles about Ed Miliband's father.