The case of the London Bridge attacker, Rachid Redouane, proves that the asylum system works well, according to a senior United Nations official.

Volker Türk, the UNHCR's Assistant High Commissioner for Protection, told RTÉ News that the fact that Redouane was refused asylum by UK authorities before he used other means to enter the UK underlines that he was not recognised a refugee.

Mr Volk emphasised the primary importance of bearing in mind that refugees are people who flee insecurity, violence and terror.

"As we can see in this (Redouane) case this person did not get asylum," Assistant High Commissioner Turk said.

"He was not recognised as a refugee."

He added that the case shows that the asylum institution works well because it makes sure that people who pursue other intentions, who are not people in need of protection, are actually not getting it.

"I think it's important to bear this in mind in this debate about asylum, security and terrorism because the one (asylum) has nothing to do with the other (terrorism)," he said in response to questions about the Redouane case.

Mr Volk was speaking after addressing the Institute of International and European Affairs in Dublin.

He praised Ireland's comprehensive response to refugees for demonstrating a level of commitment that is urgently needed from all countries.

The UNHCR's Assistant High Commissioner for Protection said that Ireland's willingness to engage internationally on refugee issues, co-leading the process that led to the New York declaration, conducting search and rescue activities in the Mediterranean, and increasing commitments to resettlement should serve as an example to other countries grappling with how to respond to the growing numbers of people forced to flee their homes because of war and persecution.

"Refugees are an international responsibility, and all countries need to share this equitably", said Mr Türk.

"The Irish people have a long history of advocating strongly for the fundamental rights of all human beings, and they carry into the present and future a firm belief in the power of moral force to move mountains."

This afternoon, he is meeting Tánaiste and Minister for Justice and Equality Frances Fitzgerald, and Minister of State David Stanton.

The UNHCR says they would discuss recent progress on reforms of the protection system in Ireland as well as UNHCR priorities for forthcoming discussions at EU level on reform of the Common European Asylum System.

Earlier, he told the IIEA that in practical terms, Ireland has not been found wanting.

He said it is supporting those developing and middle income countries hosting the majority of the world's refugees while also providing opportunities for some of the most vulnerable refugees to be resettled out of precarious situations so they build a future for themselves and their families.

"Ireland is now resettling 520 refugees a year, a figure we strongly encourage the authorities to maintain into the future," he told his audience.

Mr Türk said that much progress has been made in Ireland since the visit of the former High Commissioner for Refugees, and current Secretary General of the United Nations, António Guterres in 2012.

Recognition rates of refugees had returned to European Union averages, while crucial reforms of asylum legislation and decreases in average processing times showed that change is possible with the right levels of political commitment.

He added, however, that in light of recent limitations introduced on family reunification, it will be important for Ireland to consider new pathways for refugees to find safety, including through private sponsorship schemes.

"There are those who argue that the conditions of refugees living far away are not our concern, or our duty. However Ireland's history of flight and migration put it in a unique position to remind the world that refugees are an international responsibility, and all countries need to share this equitably."

The title of his address to the IIEA was "Global Protection Challenges: What Does The Refugee Experience Teach Us?"