Brexit - UK for Ukraine - Russian connection?

In my personal opinion, the only political force vitally interested in weakening the European Union by possibly openly financing many if not all of the European nationalistic splinter movements - is Russia, in a tit-for-tat action against Europe's support for the anti-Russia splinter movements in the post-Soviet block. Especially in the Ukraine.

Interestingly, a country that has become the most vocally anti-Russian - Poland, has become the most recent target of unprecedented attacks by Nigel Farage's UKIP supporters in Britain (see the links below). For example the Polish Institute in London (POSK) has been vandalised by grafitti for the first time in its over 60 years history and many Polish residents in Britain has been, for the first time in recent history, targeted by neatly printed plastic-framed leaflets with insulting contents totally inconsistent with the generally tolerant British tradition.
Somebody has spent real money on all that.

Who?

Why was the former London Mayor Boris Johnson unexpectedly "discouraged" (by British intelligence services?) from becoming the new prime minister, and [updated 04/07/2016] why did UKIP leader Nigel Farage suddenly have to resign today?   A Russian connection perhaps?

References:

The rise in hate crime reports is a dark sign of post-Brexit Britain
Polish boy, 11, finds 'leave EU' card
Graffiti at a Polish center in London sends a clear message: Some 'Brexit' supporters want immigrants out
Nigel Farage's relationship with Russian media comes under scrutiny
Marine Le Pen's Party Asks Russia for €27 Million Loan
A comparison of Germany's AfD and France's National Front
EU referendum: Boris Johnson labelled a 'Putin apologist' after Russia remarks

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Update on the the UKIP financing:

  http://www.bbc.com/news/entertainment-arts-38650596

Arron Banks, the former UKIP donor who bankrolled the campaign for Britain to leave the European Union, is making a move into the media sector by backing an anti-establishment news website that launches tomorrow.

and

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

Occupation Businessman Net worth £100 million[1] Spouse(s) Ekaterina Paderina

the following is also interesting:

According to Companies House records, Banks has set up 37 different companies using slight variations of his name. The names used by Banks are Aron Fraser Andrew Banks, Arron Andrew Fraser Banks, Arron Fraser Andrew Banks and Arron Banks. The profiles for the first three names all use the same date of birth but register different lists of companies. When asked by The Guardian about this, he declined to answer questions on the topic.[19] In 2016, the leaked Panama Papers indicated Banks was the shareholder of British Virgin Islands company PRI Holdings Limited, which was the sole shareholder of African Strategic Resources Limited.[20] However, a spokesperson for Banks has denied any links to the lawyer named and denies that Banks was involved with the Papers.[21]