Hi not got a clue myself but I believe it costs about £300.
I am thinking of claiming against my Local Council but the price and the lack of knowing exactly who in the council to claim against is putting me off.
I will be interested on the outcome of your enquiry so will so will look out for any tips that you may get.
maybe the £300 may put you off I don't know.
I did have a look at your other thread which the landlord said the fridge was smelly.What did he exspect after 10 weeks with no power.
maybe tell him you are taking him to court first and if no response then go ahead.
Best of luck but be warned even if the court finds in your favour they may still refuse to pay.