UK stocks opened a touch higher on Monday, led by strong gains in the mining sector.
At 08:57, the benchmark FTSE 100 index was up 8.54 points, or 0.1%, at 7,543.98.
Mining heavyweights BHP Billiton, Glencore and Rio Tinto rose 2.5%, 2.0% and 2.8%, respectively.
ConvaTec Group tumbled 15% after the medical products supplier lowered its full-year revenues forecasts due to ongoing supply disruptions.
The company said its performance was "severely impacted" by supply issues in both its advanced wound and ostomy care divisions, as well as a lower-than-anticipated revenue contribution from new products.
GlaxoSmithKline, meanwhile, said the vaccine, Shingrix, was approved in Canada for the prevention of shingles in people aged 50 years or older. Its shares fell 0.1%
Electronic trading company NEX Group said Jenny Knott stood down as CEO of its post-trade division following a recent profit warning. Its shares fell 0.8%.
Polymetal International added 2.1% after the miner posted a 26% rise in third-quarter output, driven by an expansion of processing capacity in Russia.
Meat packing group Hilton Food said it will proceed with expansion plans in New Zealand, via a NZ$54m investment in new processing facilities. Its shares added 0.4%.
Acal jumped 8.1% after the electronic component supplier said expects full-year earnings to be slightly ahead of its previous forecasts.