Platinum gained in London on concern that wage negotiations this month in South Africa, the biggest producer of the metal, may lead to supply disruptions.

Lonmin Plc, the world's third-largest producer, is starting talks with labor unions at the end of the month, Suki Cooper, an analyst with Barclays Capital in London, said in an interview today.

``The market is finely balanced,'' Cooper said. ``There could be a risk of further disruptions'' in supply.

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