In Charles Dickens day they were referred to as Staffords and owned by ruffians and the like -- I see a lot has changed
Dickens villainous pit bull in Oliver Twist, Bulls Eye, was the dog of choice for robber/murderer Sikes -- Why would he portray 'The Nanny Dog' as a villain?
Just walking her dog when pit bull jumped its fence and attacked
When it couldn't get the dog it attacked the owner -- very common in these attacks
Staffies are not on the banned dog list in England