British Citizenship Registration for Irish Citizens: New Law 2025
The British Nationality (Irish Citizens) Act 2024 has changed how Irish citizens living in the UK can become British citizens. In force from 22 July 2025, the law introduces a faster, cheaper, and far less complex registration route for Irish citizens who have lived in the UK for at least five years.
This is not naturalisation. It’s a dedicated registration process designed specifically for Irish citizens.
What the New Law Does
The Act inserts a new section 4AA into the British Nationality Act 1981, creating a streamlined path to British citizenship for eligible Irish citizens.
The idea behind this reform isn’t new. It was first proposed in 2005, gained momentum over the years, and was finally passed in May 2024. The result is a process that removes many of the usual barriers faced by other applicants
Who Can Apply for British Citizenship Registration
Both adults and children can apply under this route if they meet the following conditions:
- Lived in the UK for at least five continuous years
- Were physically present in the UK at the start of that five-year period
Absence Limits
Applicants must not have been:
- Outside the UK for more than 450 days during the five-year period
- Outside the UK for more than 90 days in the 12 months before applying
Additional Requirements
Applicants must also:
- Have complied with UK immigration laws throughout the qualifying period
- Meet the “good character” requirement under section 41A(1) of the British Nationality Act 1981
Key Benefits of the New Registration Route
British citizenship registration for Irish citizens comes with major advantages:
- No Life in the UK test
- No English language requirement
- Lower cost compared to standard naturalisation
- Simpler evidence requirements
The law also preserves Common Travel Area (CTA) rights. Irish citizens continue to be treated as “settled” once ordinarily resident in the UK.
Why This Change Matters
This reform recognises the unique constitutional and historical relationship between the UK and Ireland. For Irish citizens, it means:
- Fewer formalities
- Reduced costs
- A faster, clearer route to British citizenship
- No loss of existing CTA protections
British citizenship registration for Irish citizens is now one of the most straightforward nationality routes under UK law.
Need Help With Your Application?
If you want tailored advice or help preparing your application, Kash Legal Services can guide you through the process and ensure your registration meets every legal requirement.