The low-cost airline easyJet has revealed a 70% slide in profits because of soaring fuel costs and later bookings as a result of the conflict in Iran, only weeks after it agreed to a £5.7bn takeover.

The carrier reported a pre-tax profit of £85m between April and June compared with £286m during the same period a year earlier, as its fuel costs increased by £105m after the outbreak of hostilities in the Middle East in late February sent energy prices rocketing.