The tabloid site was typically attracting around 1.45 million average daily browsers in the months before the arrival of the extra edition of the paper on 26 February.
It hit a high of 1.56 million that month before dropping back to 1.49 million in March.
MailOnline’s daily average browsers jumped 4.4% from March to 5.65 million and Guardian.co.uk’s figure increased 4.2% to 3.88 million.
They pushed ahead of Telegraph.co.uk, which dropped 3% to 2.34 million.
Among the smaller players Mirror Group Digital piled back on the audience after a couple of bad months following the relaunch of the Daily Mirror site in February.
Independent.co.uk managed to stay just ahead after an 8% boost on March to 695,992.
Its Evening Standard stablemate, Standard.co.uk, is down to just 110,611 after an 8.2% month-on-month fall, its lowest figure since 2009.
|ABC multi-platform report|
|April 2012||Daily change (%)|
|Daily avg.||Monthly total||Mth/mth||Yr/yr|
|Mirror Group Digital||660,672||13,682,364||13.17||4.69|