Apply for British citizenship if you're an Irish citizen
After you get your certificate
Once you have become a British citizen you can travel to and from the UK using:
- a British passport
- an Irish passport
- an Irish passport card
You can also apply for a certificate of entitlement to be placed in another country鈥檚 passport if you have another nationality.
There are different document requirements if you are a British citizen and are travelling to the UK from Ireland, Isle of Man, Guernsey or Jersey.
If you have a biometric residence permit (BRP)
If you have a BRP you must send it back to the Home Office within 5 working days of getting your certificate of British citizenship - even if it鈥檚 expired.
Cut your BRP into 4 pieces and put it in a windowless envelope.
Include a note saying you鈥檙e returning your permit because you鈥檝e become a citizen. Include your name, date of birth and the document number on the front of your BRP.
Naturalisation BRP Returns
PO Box 195
Bristol
BS20 1BT
You鈥檒l be fined up to 拢1,000 if you do not return your BRP within 5 working days of getting your certificate.