Mystery of the disappearing bike stands

The latest hoop to vanish.

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

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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.

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Another hoop outside Bath’s Guildhall disappears

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

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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?