Both Beijing and the company deny the charge.
It said in a statement that the decision was made "as part of network architecture principles in place since 2006".
"We're applying these same principles to our current RFP (request for proposal) for 5G core infrastructure," the British group added.
"As a result, Huawei have not been included in vendor selection for our 5G core."
The Wall Street Journal reported last month that Washington has asked its allies to cut ties with Huawei because its equipment posed strong cybersecurity risks.
New Zealand's government last week insisted that it was not banning Huawei from its 5G network rollout because it was Chinese.
BT likewise stressed that "Huawei remains an important equipment provider outside the core network, and a valued innovation partner." The Wall Street Journal said the UK government is currently reviewing the makeup of its telecommunications equipment market.
"We need to decide the extent to which we are going to be comfortable with Chinese ownership of these technologies and these platforms in an environment where some of our allies have taken a very definite position," he said in a rare public address.
He said a report by a security committee of the US Congress has concluded that China could exert sufficient pressure on companies such as Huawei to achieve strategic security goals.
Beijing could "force Chinese suppliers or manufacturers to modify products to perform below expectations or fail, facilitate state or corporate espionage, or otherwise compromise the confidentiality, integrity, or availability," Younger said.
It changed its name and was privatised between 1991 and 1993. BT reports offering various services in around 180 countries.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)