Iran plans to accelerate crude production and exports as soon as international sanctions are lifted, possibly next spring, putting focus on a worsening oil rout and Opec’s strategy to combat low prices. While the fight for market share between Opec members and non-members is well under way, a tussle within the group is also intensifying. Saudi Arabia and Iraq have ramped up production close to record levels while Iran is amplifying its message that others must make way for its barrels. Bijan Zanganeh, Iran’s oil minister, said on Tuesday the country would increase output by 500,000 barrels a day as soon as restrictions are removed, and a further 500,000 b/d in the months after.