A month-on-month increase of 30.6 per cent saw the title near 30 million monthly unique users for January, with an exact count at 29,811,671.
Another monthly rise in unique users - 23.1 per cent for January to 25,904,722 - secured second place for Telegraph.co.uk. Year-on-year growth in unique users for the site was 109.8 per cent last month, according to the figures.
Meanwhile, Times Online leapfrogged Mail Online to record the third highest tally of unique users for January, narrowly beating its DMGT competitor by 22,898,300, to the Mail's 22,877,431.
The full figures for the six audited titles and Mirror Group's websites are listed below. The percentage in brackets indicates the month-on-month change compared with December's ABCe report:
Guardian.co.uk
Unique users: 29,811,671 (+30.6 per cent); +51.3 per cent year-on-year
Telegraph.co.uk
Unique users: 25,904,722 (+23.1 per cent); +109.8 per cent year-on-year
Mail Online
Unique users: 22,877,431 (+16.3 per cent); +27.8 per cent year-on-year
Times Online
Unique users: 22,898,300 (+19.8 per cent); +51.8 per cent year-on-year
TheSun.co.uk
Unique users: 21,910,839 (+15.6 per cent); +64.5 per cent year-on-year
Independent.co.uk
Unique users: 10,240,271 (+17 per cent); +108.2 per cent year-on-year
Mirror Group
Unique users: 6,646,495 (+25 per cent); year-on-year comparison not available
New six-monthly figures for regional media, including Guardian Regional Media, Johnston Press and Northcliffe Media, will also be released for the first time today.
The multi-platform regional report includes data for 61 online properties and networks, in addition to circulation figures for their related newspapers.
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