The police spokesman Superintendent Ajith Rohana confirmed their deportation and said that they were quizzed on arrival.
"We questioned and recorded statements from all of them and arrested one person who had travelled on a forged passport. The others have now been released," he said.
There were 22 Tamils, eight Sinhalese and six Muslims in the group.
Around 40 more Sri Lankans, mostly Tamils, who were scheduled to be on the chartered flight, were prevented from being sent back by a court action filed in the UK.
The New York based rights watchdog, Human Rights watch had urged UK to reconsider sending back failed asylum seekers to Sri Lanka while Amnesty International too had expressed opposition to the move.
With the end of the military conflict in Sri Lanka, Western nations have tightened the asylum procedures for Tamils.
