An uptick in metal prices, including the price of copper, lifted shares in miners and helped the FTSE 100 rise 0.6% to 7,490.
Copper rallied 1.8% to $3.10 per pound.
Fresnillo (FRES) led the mining sector higher with a 2.4% advance to £13.36. BHP Billiton (BLT) and Glencore (GLEN) increased 2.3% and 1.5%, respectively.
Brent crude oil nudged 0.2% higher to $63.42 per barrel.
Investor sentiment bounced back from concerns over US tax reform, as the S&P 500 climbed 0.7% higher to 2,671 around 4:40pm UK time.
MID AND LARGE CAP RISERS AND FALLERS
Oil major BP (BP.) revealed a $200m investment in solar power developer Lightsource, which is developing solar projects in the US, Europe and Asia.
Telecommunications firm BT (BT.A) announced a deal with Sky (SKY) to market and sell Sky's NOW TV service to its customers. Shares in BT were up 1.3% at 277.5p with Sky jumping 2.8%.
Newspaper publisher Daily Mail & General (DMGT) was down 1.5% at 602.6p after its US property information division Xceligent filed for liquidation.
SMALL CAP RISERS AND FALLERS
Community care property partner Ashley House (ASH) rallied 53.2% to 14.5p on a joint venture deal with Morgan Sindall Investments to develop extra care and supported living housing.
Translation software business SDL (SDL) plummeted 24.3% to 348p on a profit warning as it may not be able to close software deals by 31 December, meaning adjusted earnings will not hit expectations.
LED lighting specialist Luceco (LUCE) suffered a bigger hit after warning that profit after tax will be £3.5m less than the anticipated £16.7m. Its shares crashed 45% to 128p.
On AIM, gaming company Gaming Realms (GMR) signed a deal with Jackpotjoy (JPJ) for the supply of real money services. It also reported it would host jackpothappy.com on its platform, helping the shares level up 25% to 9.2p.
Investors were excited by oil and gas company SDX Energy's (SDX) news that its KSR-15 well in Morocco is now in production, with the shares rising 4.8% to 51.8p.
Wealth manager WH Ireland (WHI) said costs from its new model and regulatory costs hit profits, which dragged the stock 4% lower to 117.5p.