Mining stocks led the FTSE 100 up 25.69 points (0.45%) to 5,736.35 in early trading after the weaker dollar boosted gold prices.
Xstrata was up 2.3% to £12.64, BHP Billiton was 1.9% higher at £23.16 and Rio Tinto climbed 1.8% to £39.94.
Shares in Smiths Group fell 1.3% to £11.28 after Nomura downgraded its rating on the stock to "neutral" from "buy", while South Africa-focused bank Investec dropped 0.98% to 556.50p after agreeing to pay £412m for the shares in British wealth manager Rensburg Sheppards which it does not already own..
In the US the Dow Jones index rose 46 points to close at 10,896 on Monday, with mining and energy stocks leading the advances due to higher global prices.
Meanwhile, investor confidence was lifted by a further rise in US consumer spending in February, although the rate of growth was weaker than in January.
In Japan the Nikkei fell 0.1% on Monday as profit takers moved in and as many stocks reached their ex-dividend dates.
Shares in Takeda Pharmaceutical dropped 1%, while drug maker Eisai, which also reached its ex dividend date, fell 3.4% to 3,380 yen.
Stocks on the rise included Seven & I Holdings which jumped 2.8% after upbeat broker coverage by Morgan Stanley.
£300bn of liabilities
View from the front row
Transfer from occupational scheme
Appointed by FCA and PSR boards