As the Tories have their worst election result since 1832, which incidentally also gave us an electoral reform by way of the Great Reform Act, we now see the end of the duopolies 'right to rule' looming close. Very close...
I predict the EU election will be a one off reaction to a single issue - Brexit.
Brexit Party and Change UK voters will return to the Tories and Labour as will many who have registered a protest vote though the Lib Dems and Greens.
Our two party system has been shaken but will remain as such for many years to come. True reform to local and national elections can only come with a change to proportional representation. PR only favours the smaller parties therefore the Tories and Labour fundamentally do not want it. The watered down AV referendum in 2011 only happened because the result was totally predictable.