Hello, my name is Ben and it is my pleasure to assist you with your question today.
In situations such as this one, it would generally be considered that the storm that caused the damage was an act of God and as such the property owner would not be responsible for any damage that occurred to a third party's property. However, if you can show that they had been negligent in the upkeep of the roof and that the slates had either not been properly secured or maintained, then they may have some responsibility for the damage under the tort of negligence. However, if they were properly secured and the only reason they blew off was due to a 'freak' storm that would not have been expected to occur frequently then it is an act of God and the person whose property was damaged would have to either claim through their own insurance or pay for the damage themselves.
Also any claim for compensation, even of successful, will not cover stress or inconvenience, you will only be compensated for the actual damage that was suffered, which would be to repair the damage.
I know for a fact that the ridge tiles where not secured correctly because my son myself and the landlord cleared the road of the debris and all the ridge tiles had no mortar on the inside. They were pointed around but no cement was inside of the ridge tiles and we all agreed that they was not secured. So I do believe the Brewery should be held totally at fault for the condition of there property.
That may indeed be the case but you will still have to prove that this is what happened. The issue here is that whilst you can point the finger at them, you cannot force them to accept liability and pay, which means the only way to do so is to take them to court and win your claim before you can pursue them for the costs of the damage
Please let me know if this has answered your original question or if you need me to clarify anything else for you in relation to this? Thanks