Having just ploughed through the last 25 pages of this thread, I'm surprised that many people here seem to think of these European elections mostly in tactical UK terms, as if this was a FPTP sort of contest. It clearly isn't, for several reasons:
- quasi-proportional representation makes it easier for smaller parties to get seats
- the UK only gets 10% or so of seats, and the mix of those seats will most likely not swing the European Parliament's composition especially as...
- ... UK MEPs will most likely be gone this time next year because of, erm, Brexit, so they will have very little practical influence anyway.
So all the reasoning about voting tactically to prevent Farage or the Tories from doing this or that to the UK economy or the NHS seems completely off to me. This election is as close as it's going to get to being a single issue vote: which sort of Brexit, if any, do you want? It's not a GE, it's not a vote about who enabled austerity, it's not a vote about Corbyn or Boris or any of the other cast of characters.