The model of perfect competition presented the forces of competition may be ideal for consumers because the tendency of market forces to minimize prices and/or maximize firms' outputs. But in such markets, suppliers are forced to be price takers rather than price makers. in a perfectly competitive market, firms are unable to use marketing strategies to affect the price at which they sell. At a higher price, buyers will immediately substitute identical products from other suppliers. Lower prices would be unsustainable in an industry where all firms had similar cost structures. Otherwise, an non perfectly competitive market, firms are able to use marketing strategies to affect the price at which they sell. Such as UK medical service market, private hospitals and public hospitals and clinics which can raise their service fee to their patients to follow their patients demand due to their doctors and nurses service performance, medicines quality and price and patient beds supplies factors to influence their service charges to their patients in UK. Hence, NHS needs to provide different and excellent medical service to its patients to make them to feel it's service is better to other private hospitals and clinics if it wanted to apply price model to its car parking or hospital phone system service charge to its patients because it is a public sector medical service organization. It ought not charge extra service fee to its patients in its hospitals. If it charged extra service fee, such as car parking and hospital phone system service which are same or higher or lower than other private hospitals or clinic, which need to ensure which medicine quality, doctors and nurses performance which are better than private hospitals and clinics and its patient beds need have enough supply to any patients when who feel need to sleep in its hospital. Because NHS image is a non profit medical organization to any UK poor patients, who choose NHS medical service are due to its medical service charge is cheaper than private hospitals and clinics and who feel it can provide free car parking and free hospital phone system service.A market is defined here need not be a physical location where exchange takes place ( as happens in retail and wholesale grocery markets). A market in the economist's sense refers to all individuals and firms who wish either to buy or sell a specific product. A market is defined in terms of products or service and geographic description, so the UK soft drinks market refers to all individuals in the UK who seek to buy soft drinks and the suppliers to that market. The UK medical service market structure can describe as the number of consumers, such as patients and medical providers, such as private hospitals and public hospital, such as NHS ( National health service) and clinics; the barriers that exist to prevent new private hospitals or clinics or public assistance hospitals from entering the UK medical service market ( or prevent UK patients do not prefer to choose NHS medical service ); the extent to which the supply medical services is concentrated in the UK small number patients normally and the degree of collusion that occurs between patients and/or private or public hospitals or clinics medical service providers in the UK medical market.