Prime Minister Rishi Sunak faces the biggest parliamentary test of his premiership as lawmakers vote on his plan to send asylum seekers to live in Rwanda.

The UK Supreme Court ruled last month that Rwanda was an unsafe place to send those arriving in small boats on England's southern coast, and that the policy would breach British and international law.

In response, Sunak has agreed a new treaty with Rwanda and brought forward emergency legislation to override domestic and international human rights law.

The move has deeply divided his party, alienating both moderates, who are worried about Britain breaching its human rights obligations, and right-wing politicians, who contend it does not go far enough.

the i's political editor Hugo Gye explains everything that could go wrong with Rishi Sunak's Rwanda Plan ahead of the crucial vote.