According to figures obtained by the Sun, the Andrew Marr show has featured 129 Remainers since the referendum – and only 33 leavers.
And the Sunday Politics show has reportedly had 78 remain backing guests compared to only 37 Brexiteers.
Monmouth MP David TC Davies has since hit out at the broadcaster’s supposed anti-Brexit bent
Meanwhile, Jacob Rees-Mogg accused the broadcaster of having a “deep-seated bias”.
TV regulator Ofcom said: “All UK broadcasters must abide by our strict rules requiring impartiality.”
BBC Head of News James Harding stepped down from his post earlier this week, telling allies he wants to “reacquaint himself with his own opinions”.