In 2020, Roberts reportedly sent sexually suggestive text messages to a female staff member which resulted in his being referred to the British House of Commons' Complaints and Standards Committee. Roberts was also investigated by the Conservative Party; in April 2021, Roberts was "strongly rebuked" by the Conservative Party for his conduct. In May 2021, an independent panel found that Roberts had acted inappropriately after he sought to engage in a relationship with a male member of his staff; he subsequently lost the Conservative party whip in October of the same year.
