Censor.NET reports citing the president's press office.
The parties discussed topical international and security issues in the context of the Brexit referendum.
"We will find ways to continue supporting Ukraine in Brexit conditions," David Cameron said.
Petro Poroshenko thanked the Prime Minister of the United Kingdom for his firm position in support of Ukraine's sovereignty and territorial integrity.
The president also praised financial and expert assistance of the United Kingdom in the implementation of reforms and training of the Ukrainian Armed Forces.