Latest figures from Ofcom reveal there were 23.73 million residential and small business broadband connections in the UK at the end of 2014.
This represented a rise of 319,000 on the third quarter of the year, and 923,000 compared to Q4 2013, pointing to continued adoption of broadband services.
The rate of connection growth increased between October and December last year compared to July and September.
Just 192,000 new lines were added during Q3 2014, 127,000 fewer than during Q4 2014.
Copper-based ADSL lines (15.538 million) continued to account for the majority of broadband connections, although this was down by 19,000 on the previous quarter.
The number of cable subscribers rose by from 4.484 million in Q3 2014 to 4.541 million in the final quarter of last year, an increase of 57,000.
But once again, the biggest growth area was fibre broadband. Ofcom reported an increase in fibre-optic connections from 3.370 million to 3.651 million - up by 281,000 during the last three months of 2014.
The continued progress of Broadband Delivery UK rollouts in rural areas, alongside commercial deployments in the major towns and cities, meant more homes and small businesses were able to sign up for super-fast broadband deals.