Geoff, you don’t hear about many court cases as they are often settled out of court to avoid publicly!

I do know of some coroners court rulings that have required some changes to safety standards, such as the need for metal clad consumer units, and changes to guidance regarding socket-outlets in medical locations (see HTM 06-01). However, the information is not easy to come by unless you get directly involved with the incidents, consequences or changes to standards, etc.