1.  In order to do this health authorities must have comprehensive information about the existing use of health care.

2.  They can interfere with existing uses and revoke a permission already given, even if the development has actually been carried out.

3.  This may often be the avowed policy, but the planning acts explicitly permit the continuance of existing uses.

4.  On the other hand, revocations of planning permission or interference with existing uses do rank for compensation, since they involve a taking away of a legal right.

5.  Furthermore, they were used only where an owner had actually offered his land for sale at a price above existing use value.

6.  As land prices increased, due partly to planning controls, the gap between existing use and market values widened, particularly in suburban areas near green belt land.

7.  The former benefited from the full market value of his site in residential use, whereas the latter could benefit only from its existing use value.

8.  Clinton made it clear that existing uses would be permitted.