Chesterfield is famous for it’s crooked spire, Jo Guest and not much else
It is important to distinguish two elements in the spire’s ‘crookedness’ : The inclination and the twist. It is unfortunate that most people use the word ‘crooked’ unhelpfully, combining the above two features.
The inclination (lean) is due to a number of factors: the use of unseasoned (green) timber, the absence of skilled craftsmen (Black Death) and the neglect of cross-bracing.
The spiral twist is considered to be by design.
That last sentence I’ve only just found out, despite having grown up there!