Why did Nigella Lawson leave MKR?

Could you please explain to me in detail why Nigella Lawson decided to depart from MKR? Was there a specific reason behind her departure? Was it due to personal issues, differences in vision, or perhaps some other factor entirely? Did she make this decision voluntarily, or was it influenced by external factors? It would be helpful to understand the circumstances surrounding her departure and how it might have affected the company or her personal career. Thank you for your clarification.