text: The FTSE 100 ended down 55.78 at 5974.54 points, with Anglo American the biggest loser.
  Shares in British Gas owner, Centrica, were the best performer, rising through the day to end up 7% after its drop in profit was smaller than expected.
  Shares in defence group BAE Systems rose 1.3% as the company forecast earnings growth of up to 10% in 2016.
  On the wider market, Tullow Oil tumbled 11%. after the oil producer said there could be an issue with a storage vessel at its flagship Jubilee field in Ghana.
  On the currency markets, the pound was up 0.18% against the dollar at $1.4318, while against the euro, it was 0.5% higher at â‚¬1.2911.
target: (Close): London's main share market closed lower on Thursday, dragged down by oil and mining companies