Mystery of the disappearing bike stands

The latest hoop to vanish.

What is it with the disappearing bike stands outside the Guildhall in Bath?

The first one to go – on a group of three – disappeared months ago.

Months ago l noticed one ‘hoop’ was missing from a cluster of three stands to the left of the steps and now – yesterday – another one has disappeared.

Another hoop outside Bath’s Guildhall disappears

This time from the middle of the grouping right in front of the building.

Do these have scrap value?

Are these stands made of a precious metal ?Are they being stolen for scrap? Or is there a less sinister reason why they are disappearing!

Does anyone know?