Oil and commodity stocks dominated the FTSE 100 after OPEC agreed a preliminary deal overnight to cut production for the first time in eight years.
The blue chip index closed 1% higher at 6,919.
Both Shell stocks (RDSA and RDSB) rallied by nearly 6%, while BHP Billiton (BLT), Anglo American (AAL) and BP (BP.) gained up to 5.3%.
Rio Tinto (RIO), Antofagasta (ANTO) and Glencore (GLEN) were also in positive territory.
West Texas Intermediate (WTI) crude oil rose 1.7% to $47.85 and Brent crude oil jumped 1.2% to $49.28 per barrel, respectively.
Gold cheapened 0.3% to $1,315 per ounce and copper advanced 0.3% to $4,828 per tonne.
MAIN NEWS OF THE DAY
Capita (CPI) crashed 26.7% to 698p after downgrading its full year pre-tax profit forecast to £535m-£555m. It flagged a slowdown in some trading businesses and continued delays in client decision making, as well as potential litigation concerning a contractual dispute with the Co-op Bank.
US pending home sales fell in August after rising in July, according to the National Association of Realtors.
BLUE CHIP RISERS AND FALLERS
Alton Towers operator Merlin Entertainments (MERL) achieved 1.3% like for like growth in the 38 weeks to 17 September, but warned of challenging conditions in Florida. The firm said it is piloting a new brand called Little Big City, with the first attraction launching next year in Berlin. Shares were 5.9% lower at 441.8p.
MID CAP RISERS AND FALLERS
The market was impressed with Allied Minds' (ALM) alliance with GE Ventures to jointly identify and commercialise next-generation technologies, as well as invest in new and existing technologies from both pipelines.
KAZ Minerals (KAZ) completed construction and started commissioning works at the Bozshakol clay plant, which will have an annual processing capacity of five million tonnes.
SMALL CAP RISERS AND FALLERS
Exploration and production company Urals Energy (UEN) swung from an operating loss of $0.1m to an operating profit of $0.6m in the year 30 June, triggering a share price rise of 31.6% to 3.13p.
Investors dug miner Patagaonia Gold (PGD) after it reported gross revenues of 21.6m, which was driven by improved production at Lomada and a higher gold price. The company traded 24.4% higher.
European waste management firm Shanks (SKS) announced merger terms were agreed for VGG and Shanks to become a waste-to-product business for € 482m.
Anglo African Agriculture (AAAP) received an offer from Prime Meridian Resources to buy the company's 49.9% interest in its Guar Bean production joint venture in South Africa.
TI Fluid Systems, which provides fluid handling systems for the automotive industry, said it will float on London's main market. It generated £1.6bn revenue in the first half of 2016 and €185.6m earnings before interest and tax.
Edenville Energy (EDL) raised £500,000, which will be used for the advancement of commercial mining operations at the company's Rukwa site in Tanzania.
Plus500 (PLUS) declined 14.4% to 642p after its founders sold 13% of the business in a share placing to various undisclosed investors at 650p.
Newspaper publisher Daily Mail & General Trust (DMGT) nudged higher on an in-line trading update and details of an expanded restructuring programme.
Butcher Crawshaw (CRAW) slumped 2.8% on disappointing half year results. Like-for-like sales were negative, the loss before tax widened and the dividend was suspended. The firm issued a warning that this year's profit could fall 'materially' short of previous expectations.