Traders shrugged off the latest currency devaluation by China to put the London index back on the front foot on Thursday.
The FTSE 100 Index climbed 48.09 points to 6619 despite a further 1% drop in the value of the yuan versus the dollar.
The People's Bank of China intervened in the final moments of trading on Wednesday after the yuan went to a four-year low against the dollar, and on Thursday set the level a tad lower- signalling that it does not want the depreciation to be spiralling chaotically.
Analysts said the third devaluation in as many days had been expected and was less than the previous two days' falls.
Higher oil prices also fuelled the rise, with a barrel of US light crude lifting 0.6% to $43.56 and a barrel of Brent gaining more than 1% to $50.28.
BP (LON:BP.) spurted 2.9p to 386.5p and Tullow Oil (LON:TLW) gushed 1.7p to 223.1p, prompting analysts to question whether the market downturn had bottomed out.
Michael Hewson at CMC Markets said: "The key question remains whether the rebound in the oil price is a temporary respite, or a sign that we may have reached a short-term base."
The currency moves in recent days have sent shockwaves through the markets, but on Wall Street the benchmark Dow finished flat as things stabilised and commodity prices firmed.
The Shanghai Composite Index in China lost 16, to 3,870.
On the UK corporate front, Glencore (LON:GLEN) drifted a penny to 179.2p as the miner and commodity trader wrote down the value of African oil assets due to falling oil prices.
Tour operator TUI (LON:TUI) brightened 85p to 1130p on strong third quarter numbers despite the impact of the Tunisian terror attack.
Cineworld (LON:CINE) ticked up 8p to 556.5p as the cinema group posted a 22.5% rise in first-half pre-tax earnings to £64.7mln.
Soft drink bottler Coca Cola Hbc (LON:CCH) bubbled up 137p to 1460p on news of volume growth and margin expansion.
International Ferro Metals (LON:IFL) backtracked 0.52p to 1.4p as tough operating conditions in South Africa and slowing steel demand in China kept it in the red in its latest half year.
In small caps, Midatech Pharma (LON:MTPH) is to work with US–listed Ophthotech Corporation (NASDAQ:OPHT) on new treatments for macular degeneration of the eyes. Shares rose 13.5p to 283.5p.
Elsewhere, IGas (LON:IGAS) welcomed government plans which could fast-track planning decisions for shale gas and fracking projects.
New government measures will give local councils up to 16 weeks to either grant or deny fracking before Westminster steps in. Shares climbed 6.8% to 28.8p.
Conversely, tough operating conditions in South Africa and slowing steel demand in China kept International Ferro (LON:IFL) in the red in its latest half year.
The operating loss in the second half will be similar to the first half, IFL said, sending shares 29% lower to 1.35p.