Charles Saatchi and Nigella Lawson confirmed they would not make any financial claims against the other, ruling out prolonged legal arguments.
Earlier this year Saatchi accepted a police caution for assault after photographs emerged appearing to show him holding his wife by the throat.
Saatchi later told the Mail on Sunday the pictures gave a "wholly different and incorrect implication".
But he also told the newspaper: "I feel that I have clearly been a disappointment to Nigella during the last year or so, and I am disappointed that she was advised to make no public comment to explain that I abhor violence of any kind against women, and have never abused her physically in any way."
More top news
The victim was hit as she crossed the road at a pedestrian crossing in Tulse Hill.
The rate of Consumer Prices Index inflation rose to 3.1 per cent in November, from 3 per cent in October.
Mr Lewis was accused of squeezing a woman's bottom while giving her a hug at an event at the Labour annual conference.