That is true but it was in a constituency where they had no chance of winning and a lot of their supporters will have switched to Reform. Whereas Labour had held the seat and its predecessors for about a century and couldn’t even finish in second place.
I forgot to add to the above that Labour also seems to be losing another of its core blocks – the student vote. I know from my own time in Manchester over thirty years ago that parts of the constituency has a large student population. That vote also appears to be turning Green.