Oil prices ticked higher on Monday even as investors weighed US President Donald Trump’s latest tariff threat, this time on all steel and aluminium imports, which could dampen global economic growth and energy demand. Brent crude futures climbed 51 cents, or 0.7 per cent, to $75.17 a barrel by 0444 GMT while US West Texas Intermediate crude was at $71.45 a barrel, up 45 cents, or 0.6pc.