MT Newswires -ShutterstockLondon's FTSE 100 closed 0.16% lower on Monday as declines in oil prices weighed on energy stocks, while heavyweight AstraZeneca (AZN.L) slumped after reports of potential merger talks with US peer Bristol Myers Squibb. Brent crude fell after President Donald Trump called off a planned strike on Iran following intervention from Gulf allies, easing fears of a wider conflict. Still, the final S&P Global UK Manufacturing PMI stood at a four-month low of 51.9, down from the prior 52.5 and the flash estimate of 52.8, as stocks of purchases declined and jobs growth slowed. Hopefully progress relating to geopolitics, global trade tensions and the direction of the new UK government's industrial and tax policies will aid, and not hinder, this process," S&P Global Market Intelligence director Rob Dobson said. Among the gainers, wealth manager St. James's Place (STJ.L) rose 2.85% after launching a share buyback program worth 128.1 million pounds sterling.