Friday 7th May 2021: This was the second big Sporadic-E opening on 28 MHz with 568 stations in 52 countries heard on FT8 (30th of April was 403 in 39). This wasn't even the full extent of the opening as I spent maybe 2 hours listening for beacons or WSPR signals.
The map above shows the big Sporadic-E opening to the centre of Europe and you can see the arc of double hop Sporadic-E stations further east.
The one signal of interest for me was VO1CH in Newfoundland, Canada which was probably double hop Sp-E and a hint of things to come towards North America.
Beacons: I also managed to log 11 beacons on CW...
EI7GL 28245.2 DB0TEN/B 20:10 07 May IO51TU<ES>JO42UV Fed. Rep. of Germany
EI7GL 28237.4 LA5TEN/B 19:11 07 May IO51TU<ES>JO59JP Norway
EI7GL 28273.0 DB0BER/B 19:09 07 May IO51TU<ES>JO62QL Fed. Rep. of Germany
EI7GL 28227.2 IW3FZQ/B 17:23 07 May IO51TU<ES>JN55VF Italy
EI7GL 28271.0 OZ7IGY/B 17:22 07 May IO51TU<ES>JO55WM Denmark
EI7GL 28278.9 DB0UM/B 17:19 07 May IO51TU<ES>JO73CE Fed. Rep. of Germany
EI7GL 28298.0 SK7GH/B 17:18 07 May IO51TU<ES>JO77BF Sweden
EI7GL 28205.0 DL0IGI/B 17:15 07 May IO51TU<ES>JN57MT Fed. Rep. of Germany
EI7GL 28194.0 IW4EIR/B 17:13 07 May IO51TU<ES>JN54AS Italy
EI7GL 28251.0 ED4YAK/B 12:27 07 May IO51TU<ES>IN80FK Spain
WSPR: As the band was open to central Europe, I managed to hear a few stations on WSPR...
I understand the 50 MHz was also open on the 7th but I didn't check. I did try listening for the OZ7IGY beacon on 40 MHz but had no luck.