He added that Britain was "a very good ally and friend of Poland".
The prime minister’s comments about the UK came after a meeting with Boris Johnson, his peer, in London on Thursday.
The meeting was part of a tour of European capitals by Morawiecki to drum up support for Poland over the migrant crisis on its border with Belarus, and to discuss a number of other geo-political issues plaguing Central Europe.
"We promised each other to work out practically identical positions regarding the crisis on the Polish-Belarusian border, the energy crisis, the crisis surrounding Ukraine as well as the crisis connected with Moldova, and the Western Balkans," Morawiecki said after a meeting with Boris Johnson in London on Friday.
The Polish prime minister said he was very glad that "Prime Minister Johnson and Great Britain are on the same wavelength as us when it comes to the analysis of the root of the crises around us."
Morawiecki added that this unanimity extended to ways to de-escalate the border crisis, and that the main goal was to solve it.
Before meeting Johnson, Morawiecki said that the migration situation in Poland was very intense and that it was a problem for the whole of Europe.
"We can see that not necessarily good players have appeared on our borders, and this is a problem for all Europe," Morawiecki said.
Johnson declared that Poland was Britain's closest European ally in Nato as far as defence and long-term security were concerned. (PAP)