Zack Polanski may be learning a lesson on why, as a leader of a popular challenger party, retweeting 'in haste' is not the best approach to buttressing his political profile.
Certainly, the Labour Party (Keir Starmer in particular) are looking for excuses to criticise Polanski, so he needs to not make unforced errors like this (although who cannot also say they've never re-posted in haste?).
For the GPEW the political environment is becoming less forgiving.