Actual figures on readership from 2016 with change relative to the previous year:
Online -
MailOnline 14,383,578 (-2.55%)
theguardian.com 8,872,392 (1.23%)
Telegraph 4,328,890 (-6.13%)
Mirror Group Nationals 4,195,021 (-13.01%)
The Independent 2,921,273 (-12.31%)
The Sun 2,046,792 (7.16%)
Metro 1,188,978 (-16.16%)
express.co.uk 1,176,494 (-15.94%)
dailystar.co.uk 685,769 (-23.92%)
Evening Standard 479,367 (-4.53%)
Print Circulation
The Sun 1,741,838 (-2.53%)
Daily Mail 1,562,361 (-1.71%)
Metro 1,347,505 (-0.04%)
Evening Standard 902,005 (0.4%)
Daily Mirror 791,839 (-2.14%)
The Daily Telegraph 472,936 (0.19%)
Daily Star 472,869 (0.53%)
Daily Express 413,140 (1.09%)
The Times 402,752 (-0.35%)
i 269,628 (-0.82%)
Financial Times 195,515 (-1.37%)
Daily Record 174,525 (-1.34%)
The Guardian 161,152 (-1.83%)
So apparently people still read the Guardian (or at least their browsers go there) but they don't buy it much.