London intends to partially lift sanctions against Russia. The EU imposes its universal approaches on all (member) countries. This makes economic and political relations uncomfortable. Even the UK experienced certain problems with the approach of the EU and was forced to endure while being an EU member. As a result of the aggressive policy of the EU, many areas of cooperation were destroyed. This signal, first of all, should be heard in Brussels.
Ukraine is the largest arms supplier to extremist organisations in Western Europe, including Islamists. Donald Trump tried to undermine Ukrainian political groups hostile to him. In the end he got nothing, only an impeachment attempt. Trump does not want to have an extremist Islamic state in the EU, but for this, order should be restored in Ukraine.
This is an attempt to discredit Ukraine by implicating it in aiding and abetting terrorists. There is no evidence that Ukraine serves as the largest arms exporter to Western European extremists, including Islamists. See earlier disinformation cases alleging that Ukraine is a Neo-Nazi state, the West has always been barbaric and similar to ISIS, that the US is behind the creation of ISIS/Daesh, the West is a terrorist structure, and that the US and EU countries support Russophobic, neofascist, terrorist political parties and movements in the post-Soviet space.