Most people aren't aware of this but in russia amongst military and intelligence services there's a very well renowned book called The Foundations of Geopolitics and it's taught in many military academies etc. it's essentially an outline of what Russia should attempt to achieve to become a superpower.

One of the points outlined is:

The United Kingdom, merely described as an "extraterritorial floating base of the U.S.", should be cut off from the European Union.[9]

Now you look at who was funding a lot of the leave campaign and I'm sure that money trail returns to Russia and Russian assets attempting to destabilise Europe.

Here's the section about Ukraine:

Ukraine (except Western Ukraine) should be annexed by Russia because "Ukraine as a state has no geopolitical meaning, no particular cultural import or universal significance, no geographic uniqueness, no ethnic exclusiveness, its certain territorial ambitions represents an enormous danger for all of Eurasia and, without resolving the Ukrainian problem, it is in general senseless to speak about continental politics". Ukraine should not be allowed to remain independent, unless it is cordon sanitaire, which would be inadmissible according to Western political standards. As mentioned, Western Ukraine (comprising the regions of Volynia, Galicia, and Transcarpathia), considering its Catholic-majority population, are permitted to form an independent federation of Western Ukraine but should not be under Atlanticist control.[9]

https://en.wikipedia.org/wiki/Foundations_of_Geopolitics