Resurgent British high street giant Marks & Spencer is Europe's leading fashion retailer but is coming under increasing threat from rivals including C&A and Hennes & Mauritz, a report revealed on Tuesday. According to market research company Mintel, M&S sold £3.53 billion worth of clothes in 2000, which kept it ahead of German company C&A at £2.86bn and Swedish rival H&M which was third with £2.66bn.