Shares in Navan Mining, the successor to Navan Resources, began trading on the official lists of the London and Dublin stock exchanges yesterday. They opened at 52.50p sterling (€83.49) in London and closed at 52p, or 1p above the previous price. Most of the dealings are in London and volumes in that market were low yesterday, with just 61,702 shares changing hands. The group established the new UK-incorporated company with British headquarters following approval from the shareholders and the Irish High Court.