Govt calls for citizenship resignations

The Turnbull government is calling for the resignations of four MPs after the High Court disqualified Labor senator Katy Gallagher over her dual citizenship.

Attorney-General Christian Porter says therefore it's time for Labor MPs Susan Lamb, Justine Keay and Josh Wilson, as well as independent Rebekha Sharkie to stand down, given their British ancestry.

"Bill Shorten must require the resignation of those three Labor members today, and that must occur before close of business today," he told reporters in Canberra on Wednesday.