Firstly the easy bit.
If you lose the case, you will certainly have to pay your solicitor's and Court costs. If the judge thought you were seriously wasting everyone's time, he could also award costs to the park owner, which would mean that you might have to pay those, or a proportion of those as well.
I have never heard of a Resident's Association being granted Legal Aid, but I am not a solicitor and you would need to take advice from one, or the Citizens Advice Bureau.
I am checking today if a dispute involving electricity charges will in future come under the jurisdiction of the Residential Property Tribunal Service instead of the Courts and I will come back on that one as soon as I have a reply.
In the meantime, the resale of electricity charges is governed by legislation and the following link to Ofgem may be of some help to you:-
http://www.ofgem.gov.uk/Consumers/Pages/Resaleofgasandelectricity.aspx
You will also find a guidance factsheet which you will be able to download and share with your association. Once you have read this, if you still think you are being overcharged, then I personally, would have a word with Ofgem first. It may be that they would write to the Park Owner a warning letter.
Regards
Ed
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