The number of passengers flying from London Heathrow fell last month, as war in the Middle East weighed on demand for international travel. About 6.7 million people flew through the airport in April, a 5% drop compared with the same period last year. The fall reflected the impact from the Iran conflict and “short-term adjustments to travel plans”, the airport said. However, the number of transfer passengers transiting for onward flights rose 10% in April year-on-year, as travellers rerouting to Asia and Oceania switched to the Heathrow instead of using rival hubs in the Gulf such as Dubai and Doha. The US-Israeli war on Iran has triggered travel disruption around the world, with flight cancellations, delays and longer journey times. Meanwhile, fears are rising that the oil crisis resulting from the blockade of Gulf tanker shipping in the strait of Hormuz could lead to fuel shortages this summer and higher ticket prices .…