Aluminium prices in London fell for a second day as investors assessed the impact of US President Donald Trump's 25 per cent tariff on all aluminium and steel imports, set to take effect on March 12. The move is expected to reshape global trade flows for metals used in industries ranging from packaging to infrastructure. Analysts suggest the price impact will likely be felt through higher domestic premiums in the US rather than global prices. Uncertainty remains over potential exemptions, with Japan seeking relief and Australia facing pushback from US trade officials. Canada, the largest supplier to the US, also faces uncertainty. Aluminium declined 1 per cent to $2,618 a ton in Singapore, while other base metals showed mixed movements, with zinc rising 1 per cent and nickel dropping 1.2 per cent. Attribution: Bloomberg Subediting: M. S. Salama