Taoiseach Micheál Martin and British Prime Minister Boris Johnson have held a bilateral meeting on Saturday afternoon.
The duo, who attended Ireland's Six Nations clash with England in Twickenham afterwards, discussed a number of topics.
On top of the list was the invasion of Ukraine by Vladimir Putin and Russia, which a Government spokesperson described as "brutal".
The spokesperson said: "They (Mr Martin and Mr Johnson) discussed the brutal Russian invasion of Ukraine and the profound global security, economic and humanitarian consequences.
"The Taoiseach, who had just come from a meeting of EU leaders in Versailles, emphasised the strength and unity of the EU response.
"The Taoiseach and the Prime Minister welcomed the close collaboration between the EU, UK and other partners to hold Russia to account, to provide support to Ukraine and to address the humanitarian needs of its people. In an uncertain world the EU and the UK are key partners underpinned shared values."
On top of the issues surrounding the illegal invasion, a key talking point was Northern Ireland.
According to the spokesperson, there was an agreement that the two Governments need to work "closely" in the coming months.
They said: "They also discussed political developments in Northern Ireland. Looking ahead to the Assembly elections and the need for the two Governments to work closely together to ensure a return to the full operation of the institutions of the Good Friday Agreement.
"The Taoiseach welcomed the ongoing engagement between the EU and UK on issues relating to the Northern Ireland Protocol and highlighted the importance of reaching durable, practical solutions for people and businesses in Northern Ireland."
