The UK stock market fell in early trade but positive results from Berkeley lifted shares in housebuilders.
The benchmark FTSE 100 share index dropped 48.51 points, or 0.7%, to 6,704.42.
Mining shares were among the biggest fallers, with BHP Billiton down 3%, after the price of metals dropped.
In the FTSE 250, shares in Berkeley Group rose 4.6% after the housebuilder reported a 34% rise in half-year profits to £392.7m.
However, the company also said reservations were down 20% over the period, which it blamed on the higher stamp duty for buy-to-let landlords and uncertainty caused by the Brexit vote.
Berkeley's share performance lifted other firms in the sector, with Barratt Developments up 1.5% and Taylor Wimpey climbing 0.5%.
Oil prices fell back slightly after two days of strong gains that were triggered by Opec's decision to cut production next year.
The price of Brent crude slid 0.4% to $53.75 a barrel, while US crude fell 0.3% to $50.89.