Overall, the FTSE 100 was up 18.67 points or 0.30% at 6,164.72.
Shares in mining firms were among the gainers, with Rio Tinto adding 1.67%, while Anglo American was up 1.69%.
Among the fallers was paper and packaging firm Mondi, which dropped 2.5% after Russian authorities announced an anti-trust investigation into one of its subsidiaries.
(Close): London's top shares recovered from initial falls and were in positive territory by close on Monday.