Morning trading on the Stock Exchange saw shares in the Arcadia Group Plc edging higher with the news that the four Icelandic investors have upped their stake in the company to almost 11 per cent. According to AFX News the Icelandic quartet of Baugur hf, Gaumur ehf, Islandsbanki-FBA hf and Kaupthing hf now hold 20,425,000 shares in the company, or 10.8 per cent of share capital.