Following the call, a Downing Street spokesperson said:
The Prime Minister congratulated Petro Poroshenko on an emphatic election victory and praised the Ukrainian people for their determination to hold elections in such difficult circumstances and choose their own future. Mr Poroshenko thanked the PM for his personal support for Ukraine throughout the ongoing crisis. They looked forward to seeing each other at the D-Day commemorations in Normandy taking place next week.
The 2 leaders discussed how Mr Poroshenko would deal with the separatists in the east of Ukraine. They agreed that a strong message must continue to be sent to Russia to cooperate in helping to end the ongoing violence - especially in securing the border to stop the movement of weapons.
The PM praised Mr Poroshenko’s clear messages on democracy and financial and political reform and offered his continued support in helping him to build a secure and prosperous Ukraine through an inclusive national dialogue.