REGARDING the warning given to the boy racers on the rooftop of Morrison’s supermarket in Blackburn (LT, July 25), if they’re using the top floor of a multi-storey car park, is it happening during opening hours?

If not, and if the store is closed, are there not barriers they could use on the bottom floor to stop cars using the car park?

Surely, this is a matter that the store has to sort out now so as to stop wasting police time.

DoggyDogNo1 (via website).