We've had some major issues with a building firm, and following an incident, which could have resulted in serious injury, I feel it's time - unfortunately - to seek legal representation.
Try calling Danny Richardson of Richardson & Co, South Parade Leeds. No connection apart from he has done stuff for me in the past. Really good bloke, sure he will be able to help, if not he will point you in the right direction.
Don't know where abouts you are but my father in law has a practice in Skipton and does a lot of injury/neglect/building/planning/appeals work. PM if you want the contact.