Menswear retailer Moss Bros said it had seen a 'marked improvement' in trading in the 18 weeks to 5 December, with like-for-like sales up 5.5%.The company said the improvement is expected to have a 'materially positive' impact on expectations for the full year.'We are ever mindful of the uncertainty in trading conditions that lie ahead but the business is well placed to thrive in any economic climate,' chief executive Brian Brick said.