It's common for cathedral cities in England to claim that their dearly beloved minster was used by Old Noll as stables for his ironside cavalry.
A man from Winchester told me this was done in their cathedral. Another man from Durham said the Chapel of the Venerable Bede in Durham Cathedral was used as a stable because of its popery (we do know it was used as a prison after Dunbar).
However, I've read a tweet I think by the Cromwell Museum that this was only ever actually attested at Peterborough cathedral.
Is this nonsense? Are people confusing iconoclastic destruction with this very visceral image of stabling horses?
I'm familiar with this claim (particularly in the case of Worcester), but I've never encountered a primary source that confirms it. I recall that my undergrad tutor on the period, Grant Tapsell, was rather sceptical of the claims. Without wanting to downplay the value of local tradition, I think that there would be more evidence if this was, indeed, a common Parliamentarian practice. It's the kind of Royalist propaganda that flourished after the Restoration.
Moreover, it's worth noting that there wasn't actually that much iconoclasm during this period, especially compared to the reigns of Edward and Elizabeth.