LONDON (AFP) - The FTSE 100 index of leading shares closed lower on Monday with investor confidence knocked by oil prices hitting fresh highs and record-high eurozone inflation.

At the close, the FTSE 100 was down 8.2 points at 5,794.6, off a high of 5,832.6.

Royal Bank of Scotland was the most heavily-traded stock, seeing 172 million units change hands, followed by Vodafone which saw 149 million shares switch owners.

Traders said investor confidence was hit after the price of crude oil struck a record high of 139.89 dollars a barrel, despite a pledge by top OPEC crude producer Saudi Arabia to increase output to help cool prices.

Meanwhile inflation in the 15 countries sharing the euro hit a new record in May, climbing to 3.7 percent over 12 months, amid soaring oil prices, according to figures released by the EU's Eurostat agency.

British Airway was Monday's top faller, slipping 11.25 pence -- or 4.49 percent -- to close at 239.25, brought low by the spike in oil prices.

Brewer SABMiller was down 49 pence -- or 4.06 percent -- to close at 1159.

Positive broker comment lifted shares in the mining sector with Eurasian Natural Resources seeing its stock jump 83 pence -- or 6.28 percent -- to close at 1404.

Anglo American also posted a gain of 148 pence -- or 4.64 percent -- to end at 3337.