On 3 July a Chinese man, Xu Zewei, was arrested in Milan to face extradition on nine charges relating to the hack carried out by a group called Haf-nium during the Covid pandemic. Western companies had secrets stolen in 2020 and 2021 when a weakness in the Microsoft Exchange servers was exploited. The National Cyber Security Centre (NCSC), part of GCHQ, later said 70 British firms had fallen victim to ‘a malicious act by Chinese state-backed actors’. The court documents claim that officers of China’s ‘Ministry of State Security and the Shanghai State Security Bureau directed Xu to conduct this hacking’.

China is constantly probing for ‘weaknesses’ in British defences that could paralyse parts of the economy

On 30 May, a British man called John Miller, 63, was charged alongside a Chinese

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