Probably shell product as you say.
Think there was a drainage issue to, comparable to the permiable tarmac (?) that if not maintained can cause issues of reduced grip and increased damage/higher maintenance costs.
IOM don't count as there roads are race tracks ;)
There a load of race tracks here - Norn Iron. Scary places TBH and I’m too old now!
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Probably shell product as you say.
Think there was a drainage issue to, comparable to the permiable tarmac (?) that if not maintained can cause issues of reduced grip and increased damage/higher maintenance costs.
IOM don't count as there roads are race tracks ;)