Oil prices increased 0.8% to $73.45 per barrel after the US re-imposed sanctions on major producer Iran, boosting oil majors BP and Royal Dutch Shell by more than 1% apiece.
The strong performance helped the FTSE 100 rise 0.1% to 7,103.
PMI data on the UK services sector showed expansion at its second-lowest level in more than 24 months in October.
Wall Street was robust ahead of the US mid-terms this week with the notable exception of the tech-heavy Nasdaq, down 1.1% at 7,277 at around 4:45pm UK time.
Copper cheapened 1.8% to $2.75 per pound.
LARGE AND MID CAP RISERS AND FALLERS
Specialist insurer Hiscox shed 5.7% to £15.52 after it warned that growth in premiums would moderate toward the tail-end of the year.
Television broadcaster ITV dipped 0.6% to 154.8p, as it announced that it had poached software group Micro Focus International's chief bean counter Chris Kennedy as its new chief financial officer.
Capital & Counties Properties confirmed it continues to advance preparations for a potential demerger, pushing the stock 5.6% higher to 269p.
RHI Magnesita slumped 8.1% to £37.20 after warning government controls in China led to a significant reduction in raw material output, which is forecast to continue.
Micro Focus separately announced it expected its annual revenue to be at the better end of its guidance for a 6-9% fall, and that it would extend its share buy-back programme. Its shares gained 2% to £12.56.
Ryanair said passenger numbers grew by 11% during the month of October on-year, even though it cancelled over 300 flights during the period. The budget carrier's shares dipped 1.1% to €12.62.
Sirius Minerals gained 1.2% to 24.08p, as it entered into a construction contract with McLaughlin & Harvey for the development of a port handling facility to support its flagship fertilizer project in Yorkshire.
Plastics packaging company RPC Group gained 1.9% to 797.4p despite revealing takeover suitors Apollo Global Management and Bain Capital needed more time to decide on whether to make a firm offer for the company.
SMALL CAP RISERS AND FALLERS
Serica Energy rallied 7.5% to 128p on news that it had acquired an additional interest in some North Sea oil fields from BHP Billiton. Serica also confirmed that it had satisfied conditions needed to obtain a sanctions waiver from US authorities to develop its North Sea assets.