Mr Trump said his proposed 25% tariffs on Mexican and Canadian goods - delayed by a month - would take effect on Tuesday 4 March as planned, alongside an extra 10% duty on Chinese imports.
Donald Trump's threats of additional trade tariffs against China, on top of the 10% hike imposed earlier this month, have contributed to a widespread stock market sell-off.
The UK may have been spared Trump tariff threats but the FTSE 100, which is internationally focused, was still set to feel some pain with IG data indicating a decline of 0.7% when trading started.
Sentiment was already sour on the tariff front, given the spectre of 25% import duties being slapped on the EU, before the US president confirmed his intention to target Canada, Mexico and China next week.
You can receive Breaking News alerts on a smartphone or tablet via the Sky News App.