A government U-turn over fighter jets for the Royal Navy’s new aircraft carriers cost taxpayers £74m, says the National Audit Office. The decision to scrap an order for jump jets, which was later reversed, had been based on “immature data and flawed assumptions”, it says in a report. Labour says the report “lays bare this government’s incompetence”. But Defence Secretary Philip Hammond says the U-turn will save money in the long run and is backed by the NAO. “Not only did it save £1.2bn; it also means that by 2018, we will have fifth-generation stealth jets flying off the new Queen Elizabeth Class carrier,” says Mr Hammond.