Ulster Unionist Party leader David Trimble has accused the British government of taking a "softly, softly" attitude towards alleged breaches of the IRA ceasefire.
Speaking about the IRA's alleged involvement in last month's £26.5m Belfast bank heist, Mr Trimble said the British government was making a fool of itself by not ejecting Sinn Féin from the peace process.
The UUP leader said London should withdraw Westminster privileges and allowances from the four Sinn Féin MPs and push ahead with the peace process without republicans.
He also claimed the republican movement had chosen crime over politics and accused Sinn Féin voters of giving republicans a mandate for crime.