Hardened criminals come in many shapes and sizes. But, on the face of it, Lucy Connolly appears very far removed from anybody’s idea of a thuggish jailbird.

Until recently, the 42-year-old childminder lived a pretty unremarkable life. Each morning, toddlers would be dropped off in her charge at her pleasant 1930s semi on a tree-lined avenue in a Northampton suburb and she would watch over them as they played in the garden.