Can Non-Irish Citizens Enter UK via Ireland Without Visa?

No, a person who isn't an Irish or UK citizen generally cannot enter the UK via the Republic of Ireland without a visa if they require one to enter the UK.

However, there are some specific circumstances and exceptions to consider:

1. Common Travel Area (CTA): The UK and Ireland are part of the Common Travel Area (CTA), which allows free movement for citizens of the UK, Ireland, the Isle of Man, and the Channel Islands. However, this does not extend to non-citizens who require a visa.

2. Short Visits: Some nationalities may enter the UK visa-free for short visits (up to 6 months) under standard UK visitor rules. You need to check if your nationality is eligible for this.

3. Irish Residence Permit: If you hold an Irish residence permit, you still need to apply for a UK visa if your nationality requires one.

4. Transit Visa: If you are transiting through the UK to another destination, you may need a transit visa unless you qualify for a transit visa exemption.

To avoid any issues, it’s crucial to verify your specific visa requirements for entering the UK, regardless of whether you are traveling from the Republic of Ireland.