看规定不是听说 BIVS 要先到伦敦才能到爱尔兰吗？
Travelling from Ireland to the UK
If you’re not from an EEA country or Switzerland
You will not pass through any immigration control when you enter the UK from Ireland across the land border, so you don’t need any documents to enter the UK on that route.
However, you may be asked by Border Force to show your passport, which should be valid for the whole of your stay, to enter Great Britain.
Permission to enter requirements
If you have permission to enter or remain in the UK (for example if you have a UK visa) you do not need further permission to enter the UK from Ireland.
You only need to get permission to enter the UK when arriving from Ireland if:
you arrived in Ireland from outside of the CTA and did not obtain immigration permission to enter Ireland
you’re a visa national who doesn’t have a valid UK visa, or a visa granted under the British-Irish Visa Scheme (BIVS)
you entered Ireland unlawfully from outside the CTA
you entered the UK or the Crown Dependencies unlawfully and went directly from there to Ireland
your permission to enter or stay expired before you left the UK and since then you haven’t been given permission to enter or stay in the UK or any of the Crown Dependencies
you are the subject of an international travel ban
you were refused admission or subject to a removal decision under specific regulations - unless you were later given permission to enter or stay