Ok, you can submit a County Court claim, but they may have a defence under S.58 of the Highways Act.
If they can show that they have a scheme of inspection, it was followed and they didnt have any reports after inspection your claim may fail.
You need to write and set out your losses and request a refund (repair cost) within 14 days or say will go to Court within 14 days. You should make sure you send this signed delivery and keep a copy.
If they do not refund you then you can issue proceedings in the County Court. You can either do this online at: www.moneyclaim.gov.uk or by completing form N1 http://s3-eu-west-1.amazonaws.com/hmctsformfinder/n1-eng.pdf and take it to your local County Court.
The Court will then issue a claim which a copy will be sent to the Defendant who will have a limited time to defend it, if not you can enter Judgment and enforce.
If the claim is for £10,000 or less it will be a small claim so you will not need legal representation. Over this value you would need representation for trial.
Can I clarify anything for you about this today please?
If not, I would appreciate a 5 star rating for my answer. Thanks!