You can only tell it like it is, whatever way you go about it he's going to be upset.
As for the pub, if they were paying you then you should have a claim on their employers liability insurance, if they weren't then you have a claim on their Public Liability insurance. As far as I'm aware all businesses are legally required to carry both types of insurance.
I would be paying my solicitor a visit regarding that.
Good Luck
G.