Prices for flights will shoot up again if fuel costs stay high, the chief of British Airways has warned. The airline’s chief executive, Sean Doyle, said there is “no getting away from” the fact that “if fuel goes up, fares have to go up.” Since the Iran war began in February, jet fuel prices have soared. Despite ceasefire talks, the Strait of Hormuz – which supplies around 40 per cent of Europe’s jet fuel – remains closed. Following BA's warning of a possible increase in prices last month to offset…