An SNP MP found guilty of sexual harassment was put on “conduct training” four years ago over the same incident and kept his job as Chief Whip.
Allegations against Patrick Grady were initially dealt with informally by the SNP and he later fronted a Westminster debate on the harassment of staff.
Lib Dem Alistair Carmichael MP said: “It is the height of hypocrisy for the SNP to have conducted an informal investigation, covered up the result and then allowed the perpetrator to lead for the party on debates about the bullying of staff.”