Openreach is to more than double the ultrafast broadband speeds available through its Fibre-to-the-Premises (FTTP) network.
Homes and businesses using the network will be able to enjoy maximum download speeds of up to 1Gbps - up from a maximum of 330Mbps.
The move comes in advance of an extension of the FTTP network, as Openreach plans to double its size over the coming year so it reaches up to two million premises by the end of 2020.
Openreach, BT's infrastructure subsidiary, said this is part of a wider plan to make ultrafast speeds available to up to 12 million premises across the country during the next four years, using various different fibre technologies.
The organisation has also confirmed that it will launch two new wholesale products over FTTP on December 6th.
This, it said, will include a new up to 500Mbps product that boasts an upload speed of up to 165Mbps, as well as an up to 1Gbps option with upload speeds of up to 220Mbps.
Openreach hopes these two new products will be useful to small and medium-sized enterprises in particular.
Clive Selley, Chief Executive of Openreach, commented: "We’re committed to taking the UK from being a superfast to an ultrafast nation, and whilst we’re extending the reach of our Fibre-to-the-Premises network, we’re also boosting the speed and variety of the services we can offer over it.
"This is another example of how our mixed technology approach is getting the fastest possible speeds to the largest number of people in the shortest possible timeframe."
Openreach has been testing a number of approaches recently, including testing Long Reach VDSL to increase fibre broadband speeds over long phone lines.
Initial findings of tests carried out in the remote community of North Tolsta on the Isle of Lewis have been hailed as "encouraging", as most households have seen fibre broadband speeds increase significantly.