Viper's Bugloss

This evening I took a shortcut through the primary school grounds after all the children had gone home. They are developing their school garden and have a few bed with potatoes and other vegetables. By the hedge there is this wonderful bed of daisies with one blue flowered plant, see the extra. Google lens told me it is viper's bugloss. Another Blip learning day. Not at all good for horses. https://en.wikipedia.org/wiki/Echium_plantagineum