Its mainly decided ( i think ) by police , or who ever is chief of police in that town or city .
I worked in Leeds from 07 to 011 , one by one all parlours were visited then closed down , various reasons were given for their closures.
Its not even a county thing as Sheffield and Rotherham are same county , Barnsley and Doncaster are same as Sheffield albeit not as many parlours , all the same it is `tolerated ` and more or less accepted .
Same as West Yorkshire , nothing in Leeds , apart from Winstons ( but dont start me off on that ) ! Yet Pontecarlo , Dewsbury and Bradford have parlours !
Derbyshire the same with zero tolerance in Chezvegas , yet Derby has em and so on .