But in a Der Tagesspiegel interview published today he declines two separate opportunities to shoot the story down, giving the clearest indication yet that the rumours are true.
To a mention of London, Rattle responds - in jocular fashion, we have to assume - "It must be true. After all, it was in the Times."
Interviewer Frederik Hanssen persists, asking if there are any firm plans. "The only thing that is certain about the future is that we will carry on living in Berlin," says Rattle. "This was decided after family discussion. Nothing else is settled. I'm not about to start a new job the day after my Berlin farewell concert. Relationships can't be changed like underwear."