Sinn Féin is to attempt to force the Government into holding the Donegal South West bye-election by moving the writ in the Dáil tomorrow.

The party announced today that it would put a motion on the order paper for tomorrow requesting the Ceann Comhairle to call the bye-election.

Sinn Féin Senator Pearse Doherty said: 'We are now left with little choice but to table this motion tomorrow, instructing the Ceann Comhairle to call the by(e)-election for Donegal South West. Donegal is in desperate need of representation.'

However, if the motion comes to a vote it is certain to be opposed by the Government.

The Donegal South-West seat is vacant since the election of Fianna Fáil's Pat 'the Cope' Gallagher to the European Parliament in June last year.

There are two other vacancies in the Dáil at present.

They are the seats vacated by George Lee of Dublin South in February and by Martin Cullen of Waterford in March.