Labour's John McDonnell calls for Redcar steelworks investment
SSI UK, which owns the Redcar steelworks, has gone into liquidation.
The Thai parent company was earlier granted an application to wind up the UK arm of its business at the High Court in Manchester.
The government has made an aid package of "up to £80m" available for those affected but has ruled out state intervention at the plant.
Shadow Chancellor John McDonnell said more should be done to secure the possibility of the plant reopening.