Antofagasta is leading the FTSE 100 fallers on Tuesday morning after the copper miner's share price fell 4.2% to 911.4p when it revealed a 16% fall in interim profits.

Shares in software developer Micro Focus led the blue chip risers, up 1.6% at 12.64.

The FTSE 100 is up 0.13% to 7,652.65.

Card Factor, which recently issued a profit warning, is the largest faller on the FTSE 250, down 4.4% at 178.85p after investment bank Berenberg cut its guidance on the stock.

esure is up 3.7% at 277.3p after it announced that it will sell the company to Bain Capital.

Meanwhile, Royal Mail's share price is up nearly 1% at 466.6p after Ofcom levied a 50m against the postal group.

The FTSE 250 is up 0.34% at 20,645.43.