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Oct 22 (Reuters) - European shares nudged lower on Wednesday, as investors gauged a flurry of lacklustre corporate earnings and uncertainty over planned negotiations between Washington and other countries. The continent-wide STOXX 600 index (.STOXX), opens new tab was down 0.3% at 571.58 points, as of 0712 GMT. Other major regional indexes struggled for a clear direction. Sign up here. Germany's DAX (.GDAXI), opens new tab slipped 0.2%, France's CAC 40 (.FCHI), opens new tab lost 0.8%, while Spain's IBEX (.IBEX), opens new tab edged 0.1% higher. UK's FTSE 100 (.FTSE), opens new tab rose 0.5%. Data showed British inflation and a key underlying measure of price growth both unexpectedly held steady in September. A planned summit between U.S. President Donald Trump and his Russian counterpart was put on hold on Tuesday, and ambiguity lingered over a potential meeting between Trump and Chinese President Xi Jinping. Shares of French beauty conglomerate L'Oreal (OREP.PA), opens new tab dropped 7.1% on Wednesday after the company posted a weaker-than-expected quarterly growth, but projected improving demand in China. The STOXX aerospace & defence index (.SXPARO), opens new tab rose nearly 1%, with Hensoldt (HAGG.DE), opens new tab and Renk (R3NK.DE), opens new tab up 3.1% and 4.5%, respectively. Energy stocks (.SXEP), opens new tab also climbed about 1%, while the technology sector (.SX8P), opens new tab dipped 0.9%. In other moves, shares of Adidas (ADSGn.DE), opens new tab dropped 2.1% even as the German sportswear brand raised its annual operating profit outlook. Barclays (BARC.L), opens new tab rose 2.7% after the lender announced a surprise 500-million-pound ($671 million) share buyback plan and upgraded its performance target for the year. Hermes (HRMS.PA), opens new tab fell 4.7% despite signalling a slight improvement in key market China. Reporting by Sukriti Gupta in Bengaluru; Editing by Sherry Jacob-Phillips