Sir Paul McCartney is to blame for his lengthy divorce battle with Heather Mills, according to his estranged wife. Former model Mills, 39, claims she would be happy with a speedy split, but MCCartney's refusal to agree to her demands is making the divorce battle even longer. The couple split in May (06) after just under four years of marriage, and Mills predicts it could be more than a year before they are both single again. Mills is seeking for a substantial portion of the former beatle's multi-million pound fortune and sole custody of their daughter BEATRICE. Speaking to Britain's Sky News about the divorce settlement, Mills says, "It's like getting blood from a stone. It could take a year, I've got no idea. "It's not down to me, it's all down to me hubby."