The FTSE 100 fell on Monday as losses in several heavyweight shares outweighed gains in energy and mining stocks. Imperial Brands dropped more than 5% after reports said the tobacco company was preparing to cut thousands of jobs across key markets including the US and Europe, while British American Tobacco fell more than 4%. HSBC, Unilever and GSK also declined between 0.4% and 1.8%. Oil majors Shell and BP rose 0.7% and 1.5% as crude prices extended their recent advance amid uncertainty over a potential US-Iran agreement to end the conflict and reopen the Strait of Hormuz, a key oil shipping route. Mining shares benefited from stronger metals prices, with Fresnillo up 3.3% and Glencore gaining 2.2%. Elsewhere, Plus500 reported stronger first-half growth driven by higher trading income, Pharos Energy said it would not increase its offer, and Vistry reduced coverage for the housebuilder’s suppliers.