Leonardo has warned the UK government that it may be forced to shut down its helicopter manufacturing operations in Britain if it fails to secure a flagship £1 billion Ministry of Defence contract, a move that would threaten the future of the country's last remaining helicopter factory. In a letter to defence secretary John Healey, Roberto Cingolani, chief executive of the Italian defence group, said the contract to replace the long-serving Puma helicopter was central to Leonardo's long-term commitment to the UK.