The employee-owned business said on Friday sales at its department stores increased 2.9 percent to 52.9 million pounds ($87.1 million) in the week to August 13.

Sales excluding VAT sales tax increased 1.3 percent.

"John Lewis online managed to pick up the customers that couldn't or didn't get to our shops," said the firm.

"So considering the events of last week on our streets and in the financial markets it was a solid performance."

John Lewis, which has been outperforming competitors for over a year, had one store, in Croydon, south London, broken into during the rioting.

British consumers are grappling with rising prices, subdued wage growth, a lack of credit, job insecurity, a stagnant housing market, government austerity measures and fears of eventual interest rate rises.

British retail sales barely grew in July, data showed on Thursday.

Copyright Reuters, 2011