Hi @Thomas B, my case is similar to yours (EB-2 at London-UK Embassy, PD current in April but not current in May). I've also requested expedite but it's still under review.
Do you have any idea what will happen on your case? If there's not enough time to process your visa until the end of the month, do they keep your case expedited until your PD becomes current again? Or do you return to your previous place on the line (as it wasn't expedite approved)? Thanks if you can comment on that.