UK results are slightly better than the final poll:
https://www.bbc.com/news/topics/crjeqkdevwvt/the-uks-european-elections-2019
https://en.m.wikipedia.org/wiki/2019_European_Parliament_election_in_the_United_Kingdom
The “two parties” were defeated with Tories wiped out in 5th place and only 4 MEPs elected out of 73 total.
A similar result for Tories in General Election under First Past the Post voting would give them 0 MPs.
R for Remain, L for Leave, M for Mainstream (“Two Parties” blithering)
1L. Brexit 31.6%. Major success but mainly at expense of Tories and a bit less than the final poll.
2R. LibDem 20.3%. Substantial increase mainly at expense of Labour
3M. Lab 14.1% disasterous collapse but not wipeout since likely to still be ahead of LibDems in a general election to win far more seats
4R. Green 12.09% substantial increase as part of general EU and worldwide revival of pagan faith
5M. Tory 9.09% wipeout
6R. Scottish National Party 3.6% (Scotland regional)
7R. Change UK 3.4% wipeout (0 seats, will merge with LibDems)
8R. Plaid Cymru 1.0% (Wales regional)
9L. UKIP 3.0% wipeout (0 seats)
NORTHERN IRELAND has preferential system (Single Transferable Vote like Australian Senate).
First preference numbers for each of the three candidates elected shown instead of party %.
Quota for election was 143,122. Turnout higher at 45.14%
R Sinn Fein, 126,951
M Democratic Unionist Party 124,991 (effectively prefers Remain to the only deal available but would have liked to Leave)
R Alliance 105,928
UK Turnout: 17,199,701 Percentage: 36.9%
This is a smaller increase in turnout than expected (and lower than rest of EU).
Presumably a lot of Labour and Tory voters just stayed home rather than vote against their parties. If so, they would turn up again in a general election. The difference is that the Tories are likely to be outnumbered by Brexit party in most Tory seats while Labour would only be outnumbered by LibDems or Greens in some of their seats.
I haven’t seen any data on that kind of analysis.
Summary
Wikipedia summarizes (using different terms and slightly different numbers from above) as:
R Remain 41.02%
L Leave with no deal 34.2%
M Pretend to Leave with the available Withdrawal Agreement 9.9% (ie Tories but includes DUP despite it being effectively Remain)
M Pretend to be willing to Leave with a (mythical) Withdrawal Agreement or referendum 13.65% (Labour)
Both Remain and Leave each outnumber the two party “Mainstream”, with Remain larger than Leave an overwhelming majority against pretending to Leave and a large 65% majority against leaving with “No Deal”.
The 2016 Brexit referendum had a much larger turnout 33,577,342 votes, 72%.
So the EU election results are not a clear indication of how a second referendum would go.
But the Parliamentary situation that was previously just obvious is now blindingly obvious.
It is no longer possible to seriously pretend that there are options available other than Remain or Leave with No Deal.
No matter who the Tory leader is they are stuffed and so is Brexit.
Any attempt at “No Deal” will result in majority support for a “No Confidence” vote supported by senior Tory cabinet Ministers that will either result in a minority Government or a general election that will wipe out the Tory party under the current voting system.
The only other option is a referendum, which Labour will have to support even if it is in government.
The only deal possible would be rejected at a referendum.
Things may drag on for greater certainty about the outcome of a referendum, but if the Tories had any sense they would establish a Proportional Representation voting system and accept a general election while they still have a chance of continuing to exist.
So far there is no sign that they do have any sense. But I still don’t rule out a sudden concentration of their minds on the prospect of imminent non-existance resulting in some sense.
As far as I can make out there has been a less dramatic increase in strength for the far right in most of EU (with regional exceptions).
But that still leaves a two-thirds centrist majority overall (in a legislature with very little say compared with the representatives of national governments). Still, there is developing a certain level of “union” political party alignments rather than merely “federal” and there is now a major mass movement in support of the Union in the UK.
UK position is actually less clearly towards far right as Brexit party campaigned on implementing referendum rather than against immigrants as they did in previous incarnation as UKIP.
As a curiosity, Spiked went all out with the rest of the Murdoch press in support of the Brexit party.
Here’s their hilarious explanation that people who don’t think the Brexit party wiping out the Tories changes the fact that more voters supported “Remain” than “Leave” are “delusional”.
https://www.spiked-online.com/2019/05/27/this-is-not-a-victory-for-the-brexit-party/
Spiked quite correctly adds the UKIP to the Brexit party votes as “Leave”.
But then adds Tory votes as well! If the Tory party wanted to Leave they would have left.
Why not add in Labour too? They also said they wanted to implement the referendum decision to leave.
The whole point of Spiked’s campaign was (quite accurately) that both Tories and Labour were not going to implement the referendum decision to Leave (because it was based on bullshit, but that is a different issue). Now, to prove that Brexit won and anybody who thinks otherwise is delusional they count votes for the party that failed to deliver the imaginary Brexit as votes in favour of a real Brexit that was never supported at the referendum and was rejected by most voters at the EU elections. I guess it is easy to convince oneself of this stuff after being outraged at the very idea of another referendum as a “betrayal of democracy”.
What the Brexit party has done is cut through the bullshit and made it clear both that the choice is between “Remain” and “No Deal” and that the two party system is completely disfunctional. Spiked could take credit for that instead of coming up with delusional bullshit that a choice was made for “No Deal” either at the referendum when Leave supporters pretended a deal retaining all the benefits of EU membership would be easy or now when they have abandoned that pretence and their more honest position has been rejected by a large majority.
C21st Left 
PS Another Spiked article on the same delusional theme does have some interesting turnout analysis at the end:
https://www.spiked-online.com/2019/05/27/the-brexit-surge/
Confirms that turnout rose in areas that voted for Remain in referendum and fell in Leave areas.
This in fact empirically confirms a surge for Remain as a conclusion to an article deriding that claim as delusional.
The success of the Brexit party was in wiping out the Tories and helping Remain to consolidate against Labour vacillation.
It was impressive. But in no way implies that people who voted to Leave when they were lied to about an easy deal will come back to do so again now that the lie has fallen to bits. Spiked knows that. It is precisely why Spiked has to scream the absurdity that a second referendum would be undemocratic while the first was the voice of the people.
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