Labour's migrant returns deal with France will be hit with a ‘slew of last-minute legal challenges’ as ministers gear up for the first removals flights this week, the Conservatives have predicted.

The initial deportation of small boat migrants back to France is due to take place as early as tomorrow.

The ‘one in, one out’ deal with president Emmanuel Macron’s government came into effect on August 7 and since then 5,435 small boat migrants have reached Britain.

Shadow Home Secretary Chris Philp – who served as an immigration minister in Boris Johnson’s government - said Labour’s plan would be overwhelmed by legal challenges brought on behalf of migrants to prevent them being sent back.

At least 100 migrants were detained in early August after crossing the Channel by small boat.