From the Guardian

Following the same line as the rest of the European Union, the Irish government has reiterated its position that the terms of the UK's exit are not up for renewed discussion. In a statement released after tonight's votes, it said:

   The EU position on the withdrawal agreement, including the backstop, is set out in the conclusions of the December meeting of the European Council. It has not changed. The withdrawal agreement is not open for re-negotiation.

    The agreement is a carefully negotiated compromise, which balances the UK position on customs and the single market with avoiding a hard border and protecting the integrity of the EU customs union and single market.

    The best way to ensure an orderly withdrawal is to ratify this agreement.

The statement also said changes could be made to the political declaration, the portion which sets out the framework for the future relationship between the UK and the EU, if the former was willing to change its red lines.

But the Irish government added it would continue with its contingency planning for all eventualities, including for a no-deal scenario.

Ireland's deputy premier, Simon Coveney, tweeted:

   Simon Coveney (@simoncoveney)

   Backstop was agreed by UK/EU as the insurance policy to avoid a hard border in all scenarios. We hope it will never be used, or be replaced quickly by a future relationship agreement. But it is necessary and tonight's developments at Westminster do nothing to change this. #Brexit