(Updates to Asia market close) By Lucas Liew Oct 1 (Reuters) – London copper edged higher on Wednesday, driven by supply concerns after output in top producer Chile fell the most in more than two years in August. Three-month copper on the London Metal Exchange gained 0.52% to $10,322 per metric ton by 0708 GMT. Markets in China are closed from October 1 to 8 for the National Day holiday. Chile's output fell 9.9% year-on-year in August after an accident at Codelco's flagship mine on July 31. The company, the world's top copper producer, was forced to halt mining and smelting operations, which knocked 33,000 metric tons off the facility's forecast output for 2025. Elsewhere, Freeport-McMoRan was in discussions with the Indonesian government regarding rights to operate the Grasberg copper min

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