I'd guess that the damage was caused by straddling metre-wide speed cushions. This severely abrades the inner shoulders of the tyres on the chamfered edges of the speed cushions, as demonstrated four times during the 2013 British Grand Prix. It was a consequence that no one seems to have thought about before these nasty obstructions were dumped in the highways. You could attempt to sue are the council that installed the humps using www.moneyclaim.gov.uk , but I have never heard of a successful suit for tyre damage from speed cushions.