ECDC have release their weekly update. Generally cases in the EU are moving very clearly in the right direction, apart from some localised backsliding (the Azores in Portugal comes to mind - rules are being steadily tightened on the main island)
Malta is looking like an extremely strong candidate for the UK green list in early June. Finland and Romania are both looking good as well. Bulgaria and Poland are probably going to be the near-misses that don't quite make it to the green list next week