British Foreign Secretary Boris Johnson | Emmanuel Dunand/AFP via Getty Images Boris Johnson wants amnesty for illegal immigrants post-Brexit Foreign secretary ‘feels he has a moral responsibility to raise it,’ a spokesperson said.

British Foreign Secretary Boris Johnson called for granting asylum to illegal immigrants after the U.K. leaves the European Union, the Telegraph reported on Wednesday.

Offering amnesty to people who have been living in the country for 10 years would benefit the national economy, Johnson said at a meeting at Downing Street according to the report.

Johnson raised the issue before when he was mayor of London from 2008-2016. He also spoke in favor of amnesty during the EU referendum campaign that ended in the Brexit vote.

Citing a spokesperson for Johnson, the Telegraph said that Johnson "feels he has a moral responsibility to raise it, as it is what he believes.”

Prime Minister Theresa May ruled out the introduction of amnesty during her time as Home Secretary, claiming it would send out “the wrong message.”

A spokesperson for the Home Office said that the government is not looking at the issue.