Ukrainian Foreign Minister Pavlo Klimkin has said that Britain's decision to leave the European Union will pose serious challenges for the EU.

"Right now, the united Europe should overcome serious current and future challenges. I believe Ukraine can play an important role in this," the foreign minister wrote on his Twitter on Friday.

It was reported, the Brexit referendum's official tally showed that, with turnout standing at over 72%, 51.9% of British voters supported their country's exit from the European Union.