The strange thing is I've not heard any substantial allegations of "hacking" in the UK's recent snap election. Possibly it was called with too short notice for any to be organised. The other possible conclusion is that the British government is doing too good a job at weakening itself for the Russians to risk interfering...

(There is an allegation that a large chunk of Saudi money was given to the DUP, now coalition minor partners: http://www.independent.co.uk/news/uk/politics/election-dup-b... )