@boristrump thanks for sharing. That is great. Best way to check who is polling best in my area? Edit - Conclusion, which I am sharing with my friends and family:
Tactical Voting in the European Elections (Thursday 23rd May)
This election will use the D'Hondt method of proportional representation. Tactical voting for staunch remain parties is slightly complicated and much more difficult than it is to tactically vote in General Elections, where you can use tools such as https://www.tactical2017.com/.
I would encourage everyone to read this neutral blog on the D’Hondt method and how to tactically vote: https://ucl-brexit.blog/2019/05/16/eu-elections-voting-system-explained-dhondt-worry/amp/
If you want to advocate for ‘hard’ Remain (excluding Labour and their vague soft Brexit stance), then it depends on where you live. See http://www.europarl.europa.eu/unitedkingdom/en/european-elections/uk_meps.html
If you live in a region with 7 or more MEPs, then just vote for the Remain Party that you like best since tactical voting is unlikely to make a difference in the final allocation of seats to Remain supporting parties in that region (Lib Dem, Green, Change UK).
If you live in a region with 6 or fewer MEPs (like me in Yorkshire or my family in the East Midlands), then vote for whichever Remain Party is polling the highest in your region. This is likely to be Green or Lib Dem. Keep an eye out and read as much as you can ahead of Thursday https://www.bbc.co.uk/news/uk-politics-48227459