Which HMS Warspite fired before an order was given?

Was it the 74- or 76-gun HMS Warspite whose guns fired on their own?

He recalls incidents involving both ships and tentatively associates the best-known case with the 76-gun Warspite.

Two sailing warships named Warspite may have been associated with guns firing without a command during battle. The tentative identification points to the 74- and 76-gun ships and to an episode in which neither admiral nor captain had yet ordered fire. The surviving recollection is uncertain, making this a useful pointer to the anecdote rather than a definitive identification.