Conor Burns has resigned as a trade minister after a report found he used his position as an MP to intimidate a member of the public.
The Committee on Standards said he had broken Commons rules after suggesting he could use Parliamentary privilege over a debt dispute involving his father.
It had recommended he be suspended from Parliament for seven days.
No 10 said he would be replaced “in due course”.
The committee’s report found he had made “veiled threats” to to use privilege to “further his family’s interests” during the financial dispute involving his father.