Trainline has said the US standoff with Iran is hitting its revenues, with rail ticket sales to foreign visitors to Europe affected. The UK-based international ticketing aganet said it expected revenues to stay flat or decline over the coming year, citing “the effects of geopolitical tensions in the Middle East on inbound air traffic into Europe”. Airlines have reported later bookings, with considerable consumer uncertainty around summer travel plans. The US-Israel war on Iran, closure of the strait of Hormuz and subsequent blockades have raised doubts about global jet fuel supply, with carriers already beginning to cancel thousands of flights . Shares in the company dropped sharply on its earnings guidance, with the Middle East tensions adding to Trainline’s prior warnings of headwinds, including UK ticketing policy.…