Knitted Bollard Covers

I came across some unusual knitted bollard covers in different colours on Angel Meddow, Manchester, these were good random finds relating to my summer brief. I love the idea that people can create pieces of craft in an urban surrounding and how these pieces are thoughtful in a sense making people happy when they see them. A few days later, I went back and the knitted covers had gone, it was quite sad that either people had nicked them or ruined them, or were they taken down?