Worries about oil supplies contributed to pushing down big oil firms and the FTSE 100 index, which closed off 3.60 points at 4,502.20.
BP shed 5.75p to 490.25p.
Shell fell 2p to 411.75p, as investors fretted about continued strikes in Norway shutting down exports from the world’s third biggest exporter.
Royal & Sun Alliance gained 3p to 84p on news it is in talks to sell its UK life insurance business.
Centrica gained 5p to 221.25p after announcing it is looking to sell its Automobile Association business.
Marks & Spencer is up 4.5p to 360.5p as investors continue to push the price here and there on the bid for the company by retailer Philip Green.
BOC continues to climb after comments from a German competitor last week that a merger might be possible, and it closed up 10p at 932p.
Overseas, shares are trading up slightly in New York.
The Dow Jones Industrial Average index is relatively unchanged at 10,416 points, while the broader S&P 500 index is up about 1 points to 1,135.IFAonline
Smoking biggest culprit; obesity second
Average earner will gain £840 in 2018
Will also move heritage items
Responding to letter from Treasury Committee chair Nicky Morgan