Leo Varadkar told Theresa May that the ball was in her court on border issues

Ireland will not help Brexiteers design a hard border that would damage the country, Leo Varadkar has said.

In a scathing critique of the UK government, the taoiseach said that Britain must figure out Northern Irish border issues on its own before asking itself if leaving the EU was a good idea.

Mr Varadkar yesterday confirmed that Ireland, Scotland and Wales have started working together to block Theresa May’s plans to leave the customs union. He rejected concerns that Ireland’s call for a sea border with the UK would anger Westminster or Unionists in Northern Ireland, claiming “if anyone is angry, it should be us”.

It is Ireland’s strongest intervention yet against the beleaguered UK government’s attempts to leave the European Union. Yesterday the Democratic