I stripped my DC25 to component parts for a deep clean as per Beko 1987's super helpful guide. However, AFTER everything had been washed, reassembled, and tested working I noticed I had this left over spring! I can't recognise where it's from, it's not the brush bar belt tensioner (I visually checked there is a spring in the hole there).
Do you recognise where it's from? It's quite a stiff one
PS. Pen for scale