METALS-London copper climbs on robust demand; China leadership meet in focus

(Adds comment, detail, updates prices) By Melanie Burton MELBOURNE, Oct 18 (Reuters) - London copper climbed on Wednesday, supported by healthy demand growth expectations and relief from a stronger dollar, while markets looked ahead to policy announcements from China's Communist Party conference. "China's underlying demand for copper remains stable and solid," said Hong Kong-based broker Argonaut Securities. There has been stable demand from China's power sector, and strong dem