This is not agreed in relation to Challenge B as it establishes a subjective test which implicitly secures a brake on housing provision for extraneous needs. By having a test which says more housing except if there is an adverse effect artificially limits provision to meet demand arising outside the Borough. That external demand will find its way into the borough whether housing land is provided or not. If it is not catered for it will simply contribute to a combination of house price rises and ripple effect migration, both of which run counter to Government sustainability policies.