India, July 11 -- U.K. stocks are down in negative territory on Friday, weighed down by disappointing GDP data, and renewed trade tensions.

Data from the Office for National Statistics said U.K.'s GDP fell 0.1% in May, following a 0.3% drop in April, due a sharp fall in industrial output.

On the trade front, U.S. President Donald Trump announced a 35% tariff on Canadian imports, starting Aug. 1, in a dramatic escalation of a trade war with the United States' closest ally over the country's alleged role in fentanyl flows.

He also talked about blanket tariffs of 15% to 20% on most of America's trading partners and announced plans to make a 'major statement' on Russia, denting investors' appetite for riskier assets.

Investors also await a ...