Grayling handed £100,000 ports adviser position for seven hours a week
The former transport secretary has been involved in a number of controversies during his time in politics.
The former transport secretary has been involved in a number of controversies during his time in politics.
Chris Grayling has written to Intelligence and Security Committee chairman Julian Lewis to tender his resignation, a committee statement said.
The Tory backbencher was expelled from the parliamentary Conservative Party after winning the chairmanship of the ISC with opposition votes.