I believe that the highway authority has some sort of defence if they were unaware of the defect. Evidence of a previous report is crucial for a claim to be successful.
As for whether or not you should claim I must say I wouldn't give it a second thought. You pay your taxes to the authorities and their duty is to spend that money 'inter alia' on maintaining the the road surface. If they have failed in their part of the bargain and it has cost you money it is only right that they should pay.
If this had been the cause of you coming off and going under the wheels of an oncoming articulated lorry. Who then would be saying just take it on the chin. Certainly not the lorry driver who is being investigated or even gripping the rail charged for causing a death by careless driving.
I wouldn't have any concerns about how the council might be better spending the money. As like as not if they don't pay it to you it will go on financing their expenses or some lavish foreign jolly to research how they do road repairs in St Tropez!
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