This year's score makes politicians the least trusted profession in Britain, the pollster said.
Trust in politicians is even lower among Londoners and people aged 25-34, at 3% and 2%, respectively.
Similarly, only 10% of Britons trust government ministers to tell the truth, down six points from 2022, which marks a new all-time low for the profession. The ministers are followed in ascending order by advertising executives (16%), journalists (21%) and real estate agents (28%).
The specified professions have scored below the average of 51%, which is how many Britons would trust the average person on the street. The same proportion of the respondents trust lawyers and civil servants.
A total of 54% said they trust priests to tell the truth, while 56% put their trust in police officers and 74% in scientists, judges and members of the armed forces.
The top five trusted professions this year are doctors and engineers (85% each), librarians (86%), airplane pilots (87%) and nurses (88%), according to the poll.
The survey was conducted via phone interviews in two waves: first among 1,020 British adults from November 8-14 and then among 1,015 Britons from November 15-21.