Freshfields Bruckhaus Deringer and Clifford Chance (CC) have taken lead roles on Russian gold and silver mining company Polymetal’s $500m (£317m) initial public offering (IPO) on the London Stock Exchange.

Polymetal, the world’s third-largest silver producer, hopes to join the FTSE 100 index with the move, having recently posted a market capitalisation of approximately $7bn (£4.4bn).