Borders, Citizenship and Immigration Bill [Lords]

Travellers from Northern Ireland are UK citizens, but what the measure that the Minister describes as "limited and proportionate" would mean that all of them would be treated as non-UK citizens, even when they travel within the UK. Leaving aside the practical difficulties, does he accept that there is a real political difficulty with that? If the clause were to go through, a large section of people who regard themselves as UK citizens would be treated as though they lived outside the UK.