Shares of Manchester-based specialist fit fashion retailer N Brown Group — whose brands include JD Williams, Simply Be and Jacamo — rose about 7% after it said third quarter revenue rose 4.1% and strong Christmas trading was driven by a record “Cyber fortnight.”

N Brown shares rose to around 217p, giving the firm a current stock market value of more than £600 million.

N Brown Group CEO Angela Spindler said: “I am pleased to report a good trading period, with standout performances from ladieswear and the Simply Be brand. 

“All key brands and categories grew in the period, including our traditional titles which had diluted performance in the first half. 

“Online sales were up 12%, accounting for 70% of group revenue. 

“Mobile devices made up 72% of traffic and conversion on mobile devices continues to improve.

“We are benefitting from improved trading agility as a result of the transformational changes we have made. 

“This was reinforced by our performance across Cyber fortnight which resulted in two record-breaking weeks for the business. 

“In light of our trading performance, as we approach the year-end, we are comfortable with current market expectations.

“We are operating in what continues to be a challenging period for the industry and are still in the process of delivering some key elements of our transformation plan. 

“I am, however, very pleased with the progress we are making.”