Yasmin Yusuf, the designer credited with helping revitalise ladies' wear at high-street retailer Marks & Spencer, is leaving the company after three and a half years.

Yusuf, who joined M&S from fashion chain Warehouse, will leave her post as creative director of women's wear at the end of September.

In a statement on Thursday, she said she planned to develop her own clothing line.

Yusuf's departure follows the launch last week of her first solo collection for M&S called Limited.

It is also comes as Kate Bostock, former product director of George at Asda, is poised to join the company as director of ladies' wear.

M&S chief executive Stuart Rose said:  "Yasmin has made a significant contribition to women's wear. She has improved our design capability, developed our approach to 'top to toe' dressing and played an important part in launching Limited Collection."