The more the place becomes empty , the less footfall of shoppers the higher the footfall of street drinkers/drugs and general anti social behaviour. These activities are often governed by having a lots of people around they go and find other hovels to take their anti social activities.
Be interesting to see now that we are exiting the EU whether lots of the Polish and Portuguese community in Wrexham decide to move again- if they did and their shops closed up to another 12 shops within the town centre could become empty.