ENTITIES:
1. Site (attribute: Location/Park (3x North of England), Capacity (30-150 caravans), Caravan).
2. Caravan (attributes: ID, Type/Category (attributes: bronze, silver, gold), Booking Fee)
3. Park (attributes: Staff)
3. Staff (Front Desk (attributes:), Estate Staff(attributes:), Cleaner(attributes:))
4. Customer (attributes: CustomerID, CustomerType (CarOwner, CarRental), GroundRent, )
5. Manager (ManagerID, )