The FTSE 100 closed up 5.15 points at 10,373.20.
The FTSE 100 Index is up 5.15 points or 0.05% today to 10373.20
In New York, the Dow Jones Industrial Average was down 0.3%, the S&P 500 was 1.2% lower, and the Nasdaq Composite dropped 2.2%.
Oil prices also fell after US President Donald Trump said negotiations over a peace deal to end the Middle East war were in their final stages.
Market sentiment remained wary following fresh US military action against Iran.