I suspect Greens are drawing level with Labour.
Greens are roughly up 100,000 and YP has 50,000. Not all of these will have come from Labour but experience suggests that they disproportionately do (I imagine it's the same for YP).
Nm the fact that Green numbers could be higher.
🟣 'Your Party' update
Jeremy Corbyn announces the party has 50k members
Latest figures from the main parties look something like this (whether Labour are still in 1st place is questionable.)