BT added over a quarter of a million fibre broadband subscribers during the final quarter of the 2014-15 financial year, it has been revealed.
The broadband provider gained 266,000 BT Infinity customers between January and March, taking the firm's fibre customers base through the three million mark.
Fibre broadband growth accelerated during the quarter, on the back of 209,000 super-fast additions between October and December 2014.
In total, Openreach added 455,000 fibre broadband connections during Q4 2014-15, including those delivered by other providers via BT's wholesale network.
This made it a record quarter for fibre broadband adoption in the UK.
"Our investment in super-fast broadband is a success story for the UK," BT stated.
"To take it further we have announced large-scale trials this summer of ultra-fast fibre broadband with G.fast technology."
The company said that, with the right investment and regulatory environment, it expects to deploy G.fast "at scale" and make broadband speeds of up to 500Mb available to most of the UK within a decade.
"So far we have passed more than 22 million premises with our super-fast fibre broadband network, over three-quarters of the UK," BT noted.
"Our rollout is nearly two years ahead of our original schedule and, following competitive tenders for additional funding, we continue to work with the government to help take fibre to 95 per cent of the UK."
In terms of standard, non-fibre broadband, BT added 121,000 customers between January and March - 49 per cent of net additions in the UK market.
This took the firm's broadband customer base to 7.713 million.
BT identified two main reasons for the surge in adoption: the construction of new homes and former customers reconnecting their fixed-lines to benefit from broadband.