Petro Poroshenko expressed his opinion with GB News.
Asked about future NATO membership of Sweden and Finland, Poroshenko stressed that the security in Europe is insufficient without Ukraine in NATO.
"Russian aggression against Ukraine showed the destruction of the entire postwar security system based on the UN Security Council. Now the world has left no effective security mechanism other than NATO," noted Poroshenko.
He recalled that in the early 1990s, Ukraine renounced the third largest in the world nuclear arsenal.
"And in return we got the Budapest Memorandum security guarantees. And Britain was one of the guarantor countries. However, the guarantees didn't even worth the paper they were written on," said the former president.
"I think the future membership of Finland and Sweden isn't enough for security in Europe if Ukraine will not become a NATO member. That's why in June during the NATO Summit in Madrid we should definitely receive a Membership Action Plan for Ukraine," concluded Poroshenko.