London stocks slip as oil weighs on Shell and BP

London's FTSE 100 fell 0.5% on Thursday, ending a six-session winning streak as lower oil prices dragged down energy giants Shell and BP. The decline offset positive corporate earnings and relief from strong US tech results. Brent crude dropped 0.5% to near $87.40 per barrel amid diplomatic talks between Qatar and Iran over reopening the Strait of Hormuz. Insurer Prudential fell 1.2% despite reporting an 8% rise in first-half new business profit to $1.38 billion. UK vehicle production fell 11.6% year-on-year in July to 63,655 units, with exports down 15.9%. Traders await Federal Reserve Chair Kevin Warsh's Jackson Hole speech Friday for clarity on global credit costs.