Britain's nuclear submarine engineers are using software designed in Russia and Belarus, which contravenes Ministry of Defence rules. The Telegraph revealed that the software contract was handed to Belarusian engineers, raising national security concerns. The British Ministry of Defence has recognized the security threat and launched an investigation into the matter. There are fears that outsourcing coding work to Russia and its allies could pose significant risks to national security. The software firm involved has attempted to cover up the origins of the software and discussed hiding the workers' whereabouts.