Polish Prime Minister Donald Tusk said that a group of European leaders will travel to London this Sunday to discuss joint defense and security plans, Politico writes.

Tusk said the European Commission is preparing a defense package, the details of which will be announced at a special summit of EU leaders scheduled for March 6.

“Ahead of this meeting, we will be in London on Sunday with our British friends and a group of leaders to discuss these joint defense plans,” he added.

“I hope ... that this great mobilization of Europe, both the member states and Europe as a whole, when it comes to financing defense and security, will become an undeniable fact,” Tusk said after meeting with European Council President António Costa.

Costa earlier Tuesday announced a videoconference of European leaders on Wednesday morning ahead of a special summit to discuss French President Emmanuel Macron's visit on Monday to Washington, where he met with U.S. President Donald Trump to seek security guarantees for Ukraine.

British Prime Minister Keir Starmer will meet with Trump on Thursday. He announced Tuesday that the United Kingdom will increase defense spending to 2.5 percent of gross domestic product starting in 2027.