Despite his claims to the contrary, there are ominous signs that Brown is keen to impact upon our national politics. His clearest boast in the interview is that he "understood what was happening" during the financial crisis – an argument he'll make in long-form in a book to be published, we now learn, this November. That tome may not trouble the Christmas bestseller lists, but it's bound to appear on the radar of the new Labour leader. The question will come: do you agree with the Brown thesis? And the response could well define how far they have moved on from the "investment vs cuts" consensus of the New Labour years.