Japan is trying to sell Britain submarine-hunting patrol jets to replace the RAF’s axed Nimrod planes, as the country pushes arms exports for the first time in decades. Officials proposed a sale of P-1 maritime patrol aircraft last year during a visit to the UK, in a deal that could top £600 million. Britain scrapped its own Nimrod patrol planes after the 2010 cost-cutting defence review and has since had to rely on allies including France, Canada and America to fill the gap. The Ministry of Defence admitted last month that it had called on allies to send four planes...