Jonathan Arnott, UKIP MEP for the North East of England, has resigned from the party.
In a lengthy statement he expressed his dissatisfaction with UKIP's current leader, Henry Bolton, as well as "those jockeying for position and trying to take his job."
He also took aim at what he felt was the party's weakened stance on Brexit, as well as a change in position on cultural and religious issues that didn't reflect his own views.
Mr Arnott will now represent his north east constituents as an independent.
He was a member of UKIP for 17 years.