Beginning in 2010 the UK intelligence community investigated Huawei, the Chinese supplier of BT's new fibre infrastructure with increasing urgency after the United States, Canada and Australia prevented the company from operating in their countries. Although BT had notified the UK government in 2003 of Huawei's interest in their £10bn network upgrade contract, they did not raise the security implications as BT failed to explain that the Chinese company would have unfettered access to critical infrastructure. On 16 December 2012 the prime minister David Cameron was supplied with an in-depth report indicating that the intelligence services had very grave doubts regarding Huawei, and that UK governmental, military, and civilian privacy may have been under serious threat.