What does it mean?
It probably means “In Transit” to “Northern Ireland” as opposed to visiting the Republic of Ireland.
The need for this sort of annotation is partly because of the Common Travel Area (CTA) arrangements between the UK and Republic of Ireland which allow for travel across the international border in Ireland without border checks.
Should I be worried about this?
You should not be worried about this marking.
Credit:stackoverflow.com‘
5 Mar, 2024
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