Unless that other driver comes forward there is nothing to be done other than being parked in a disabled bay without a blue badge of which this company own the car park and its not law breaking for anyone to park in a disabled bay especially if that bay is owned by a company otherwise private, Unless they have signs up stating different which is very unlikely as its a supermarket chain blah blah!
He will be told to be more careful by management and most of all to get to work on time and thats it sorry
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