The European Commission president has said Britons will “soon regret” Brexit during a state of the union address in Brussels.
Jean-Claude Juncker added Europe would “always regret” the Brexit vote, but insisted “we will keep moving, because Brexit isn’t everything”.
During the address, he spoke about securing new EU trade deals with New Zealand and Australia, ruled out Turkey becoming a member and said a new migrant deportation policy would be proposed by the end of September.
Video: EU Parliament Vice President defends Juncker’s comments
Mr Juncker proposed a summit on 30 March 2019 – the day after Brexit takes place – in the Romanian city of Sibiu to map out the future of the EU with just 27 states.
He told the commission: “We have to respect the will of the British people. But we are going to make progress, we will keep moving, because Brexit isn’t everything, it isn’t the future of Europe.”
To cheers from pro-Brexit members, including former UKIP leader Nigel Farage, he added: “I think you will regret it quite soon.”
:: Fourth round of Brexit negotiations delayed
Video: German car boss: EU27 ‘more important’ than Britain
Mr Juncker said the European Commission would open free-trade negotiations with Australia and New Zealand and aim to conclude talks with Mexico and South America trading bloc Mercosur by the end of the year.
He said the bloc was bouncing back a decade after the global financial meltdown – with faster economic growth than the US.
Unemployment in Europe was at a nine-year low, he said, and the bloc was in the fifth year of an economic recovery that had finally reached every single member state.
He said: “The wind is back in Europe’s sails. Now we have a window of opportunity, but it will not stay open forever.
“Let us make the most of the moment: catch the wind in our sails.”
:: Germany plans for ‘worst-case scenario’ Brexit
Video: ‘This is impossible’: Brexit talks
Mr Juncker accused Turkey of distancing itself from the EU and said the country would not become a member of the bloc for the “foreseeable future”.
He criticised Turkish President Recep Tayyip Erdogan and his government for the arrest of journalists and a crackdown following an attempted coup last year.
Video: Crucial Brexit bill scrapes through first vote
By the end of September, the European Commission will present a set of proposals on immigration that will focus on the return of those not eligible to stay in Europe and the opening of legal pathways to migration.
He said: “When only 36% of irregular migrants are returned, it is clear we need to significantly step up our work.
“This is the only way Europe will be able to show solidarity with refugees in real need of protection.”
Mr Juncker also called for the roles of the president of the European Commission and the president of the European Council to be merged in future.