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The number of British citizens applying for Irish passports increased by 22 per cent this year.
Almost 100,000 Irish passport applications were received from Great Britain in 2018, Ireland's foreign office said.
It more than doubled the total number of annual applications since Britain voted to leave the European Union.
The figure is up from 81,000 last year and 46,000 in 2015, the year before the Brexit vote led to a sharp rise in applications.
Anybody born in the Irish Republic or Northern Ireland, or with an Irish parent or grandparent, is entitled to an Irish passport – a total of about six million British citizens. They are able to hold dual citizenship.
"Brexit betrayal" march in LondonShow all 43 1 /43"Brexit betrayal" march in London "Brexit betrayal" march in London A protester holds an anti-BBC sign
Angela Christofilou/The Independent
"Brexit betrayal" march in London A pro-brexit demonstrator holds a sign in the picket line
Angela Christofilou/The Independent
"Brexit betrayal" march in London A protester carrying a noose at the "Brexit betrayal" march. The man carrying it told a reporter: "That's what the traitor May deserves."
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"Brexit betrayal" march in London Pro-brexit supporters hold a sign opposed to Nigel Farage
Angela Christofilou/The Independent
"Brexit betrayal" march in London Protesters carry a defaced British flag on the march
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"Brexit betrayal" march in London Tommy Robinson addresses a rally after taking part in a Brexit 'betrayal' march in central London
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"Brexit betrayal" march in London Police officers attempts to keep rival protesters from clashing at the Brexit 'betrayal' march in London
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"Brexit betrayal" march in London A protester holds an anti-Theresa May sign
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"Brexit betrayal" march in London A pro-brexit demonstrator and his dog
Angela Christofilou/The Independent
"Brexit betrayal" march in London A pro-brexit demonstrator at the protest
Angela Christofilou/The Independent
"Brexit betrayal" march in London A pro-brexit sign at the rally
Angela Christofilou/The Independent
"Brexit betrayal" march in London Pro-brexit demonstrators endorse UKIP
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"Brexit betrayal" march in London A Brexit 'betrayal' march protester wearing a Make Britain Great Again hat in London on 9 December 2018
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"Brexit betrayal" march in London Brexit 'betrayal' marchers gathering on Park Lane ahead of a protest
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"Brexit betrayal" march in London The "Brexit Betrayal" march passes through Central London
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"Brexit betrayal" march in London Tommy Robinson tells protesters to join Ukip via their mobile phones on stage next to leader Gerard Batten (right) at the Brexit 'betrayal' march
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"Brexit betrayal" march in London A protester speaks thorugh a megaphone on the march
Angela Christofilou/The Independent
"Brexit betrayal" march in London A pro-brexit demonstrator walks in the picket line
Angela Christofilou/The Independent
"Brexit betrayal" march in London A pro-brexit anti-May sign at the rally
Angela Christofilou/The Independent
"Brexit betrayal" march in London A protester carries a Union Jack on the march
Angela Christofilou/The Independent
"Brexit betrayal" march in London A pro-brexit demonstrator wrapped in the Union Jack
Angela Christofilou/The Independent
"Brexit betrayal" march in London A pro-brexit anti-May sign at the rally
Angela Christofilou/The Independent
"Brexit betrayal" march in London Pro brexit demonstrators move through Central London
Angela Christofilou/The Independent
"Brexit betrayal" march in London A pro-brexit demonstrator marches with sign
Angela Christofilou/The Independent
"Brexit betrayal" march in London A pro-brexit demonstrator holds a rude sign in the rally
Angela Christofilou/The Independent
"Brexit betrayal" march in London The march passes down Victoria Street near Parliament
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"Brexit betrayal" march in London A festive protester marches near Parliament
Angela Christofilou/The Independent
"Brexit betrayal" march in London A protester holds a mock noose as the march passes down Victoria Street towards Parliament
Angela Christofilou/The Independent
"Brexit betrayal" march in London A protester wrapped in the Union Jack marches down Victoria Street towards Parliament
Angela Christofilou/The Independent
"Brexit betrayal" march in London A protester makes some noise on the march
Angela Christofilou/The Independent
"Brexit betrayal" march in London A protester dressed as a dinosaur holds a sign rallying against "Davocracy" - in reference to the annual World Economic Forum meeting in Davos
Angela Christofilou/The Independent
"Brexit betrayal" march in London A protester holds a pro-brexit sign on the march
Angela Christofilou/The Independent
"Brexit betrayal" march in London The march approaches parliament
Angela Christofilou/The Independent
"Brexit betrayal" march in London A protester distributes pro-brexit lapel badges
Angela Christofilou/The Independent
"Brexit betrayal" march in London A demonstrator wears an anti-EU poster and holds an anti-BBC sign
Angela Christofilou/The Independent
"Brexit betrayal" march in London A smoke bomb is deployed in Parliament Square as the march comes across the counter-demonstration
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"Brexit betrayal" march in London
Angela Christofilou/The Independent
"Brexit betrayal" march in London A flag bearing the Arms of Plantagenet flies in theprot
Angela Christofilou/The Independent
"Brexit betrayal" march in London Protesters on the Brexit 'betrayal' march in London on 9 December 2018
Angela Christofilou/ The Independent
"Brexit betrayal" march in London Protesters on the Brexit 'betrayal' march in London on 9 December 2018
Angela Christofilou/ The Independent
"Brexit betrayal" march in London Brexit 'betrayal' marchers gathering on Park Lane ahead of a protest on 9 December 2018
Angela Christofilou/ The Independent
"Brexit betrayal" march in London Brexit 'betrayal' marchers gathering on Park Lane ahead of a protest on 9 December 2018
Angela Christofilou/ The Independent
"Brexit betrayal" march in London
Angela Christofilou/The Independent
Nearly 85,000 applications came from Northern Ireland, where citizens can hold both an Irish and British passport as the province is part of the United Kingdom, an increase of 2 per cent over last year.
Minister for foreign affairs Simon Coveney said a total of 822,581 travel documents were issued.
Brexit: What will happen in 2019? With three months left until the UK is due to leave the EU on 29 March, the draft divorce deal reached between both sides is floundering ahead of a planned vote in the British parliament next month.
Additional reporting by agencies
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