The FTSE 100 fell about 0.6% on Tuesday, reversing yesterday's modest advance, led by miners and tech investment funds while investors continued to assess the political situation in the UK. Copper miners Antofagasta and Anglo American slipped 5.2% and 4.2%, respectively, while gold miners Fresnillo plc and Endeavour Mining dropped 5% and 2.4%. Scottish Mortgage Investment Trust also declined 4.5%, tracking weakness in US tech amid a broader selloff and its exposure to SpaceX. Rio Tinto, Polar Capital Tech Trust and Glencore also declined around 3%. On the upside, top gainers included Babcock International Group and Marks and Spencer, up 2.9% and 2.5%, respectively. Bunzl rose 1.3% after upgrading its full-year outlook, supported by stronger-than-expected first-half trading and a small acquisition in Australia.