European leaders have criticised the UK's offer to EU nationals after Brexit - with one senior figure claiming it could "worsen the situation" for them.
Theresa May conceded there were differences between the two sides.
But the prime minister said those who had "made their lives and homes" in the UK would have their rights guaranteed.
She also suggested that while rights would be enforced by British courts, they could also be enshrined in international law if the agreement was included in the final treaty of withdrawal.
Read more: Brexit: EU leaders says UK offer could 'worsen situation' - BBC News