A former adviser to former UK Prime Minister Boris Johnson claimed that Chinese actors had infiltrated sensitive British government and intelligence systems in 2020. The allegation was widely reported, but both current and former UK officials have publicly refuted it, stating that there is no evidence to support the claim. The officials underscored that the UK has robust cyber defences and that any alleged breach would have been detected and contained. This incident highlights the importance of accurate attribution in cybersecurity, especially when high‑profile claims are made about state‑level hacking activities.