The government’s decision to water down new foreign investment rules designed to protect national security casts serious doubt about its resolve to keep China out of the most sensitive parts of the British economy. Raising the threshold above which an overseas stake must be examined from 15 per cent to 25 per cent will sharply reduce the number of deals facing scrutiny. The amendment to the National Security and Investment Bill, now wending its way through parliament, was presented by business secretary Kwasi Kwarteng as necessary to show Britain is still ‘open for business’. It follows intense lobbying by the Confederation of British Industry, which fears the new rules will deprive industry of investment just as it is emerging battered and bruised from the Covid pandemic.