Forget the best infinity pool or alluring sea view: travel firms are now competing for the summer holidaymakers’ pound with pledges of the least likely cancellation – or the fastest refund. Airlines and travel companies have been vying to announce fresh commitments to reassure jittery consumers who are booking flights ever later since the start of the US-Israel war on Iran. The hostilities have been driving up oil prices, with jet fuel costs rising even more sharply. More worrying for many thinking of a summer trip, as the standoff and blockades around the strait of Hormuz continue, is the prospect of scarcity leading to flights being axed. Some European airlines such as Lufthansa have already cancelled thousands of flights owing to rising fuel costs, while Virgin Atlantic has introduced a fuel surcharge on long-haul flights.…