保守新党
On 3 May 1989, Powell resigned from the National Party and declared himself an independent. He continued as Speaker until 5 July 1989, when the government voted against him on a matter of privilege; his resignation prompted scenes of chaos in the chamber. He remained a Member of Parliament until his sudden resignation on 31 July 1989; he formed the New Conservative Party and ran for Isis as an independent at the 1989 election, but without success.