@skynews: What happens if China "turns off the tap"? MPs are warning the UK remains dangerously exposed to China's dominance of critical minerals, which are used in everything from smartphones to F-35 fighter jets. Tom Cheshire explains why Britain's dependence on Chinese supply chains is becoming a national security concern. Join Sky News Defence Insider today and get your first three-months free. 📱 £14.99 a month thereafter unless cancelled. New customers only. Terms apply. #SkyNews #DefenceInsider #China