The UK is determined to smash the "evil" business model of people traffickers, an immigration minister has said, after 27 people drowned crossing the Channel on Wednesday.
Kevin Foster said the UK, France and rest of Europe must tackle the problem together, following the biggest single loss of life in the Channel on record.
A fifth person has been arrested in connection with the fatal crossing.
Five women and a girl were among the dead, France's interior minister said.
Gerald Darmanin also said two people had been rescued and one was missing.
It was earlier reported 31 people had died, but the total was revised down overnight into Thursday.
Mr Foster told BBC Breakfast ruthless criminals were sending people into the Channel's dangerous waters on flimsy boats without proper equipment.
"Those who organised that boat yesterday would have just viewed these people... who passed away, as just a profit-making opportunity," he said.
The alarm was raised on Wednesday after a fishing boat crew spotted several people in the sea off the coast of France.
The International Organization for Migration said it was the worst single loss of life in the Channel since it began collecting data in 2014.