Please tell me ? if they're being admitted to the hospital with kidney…

Please tell me ? if they're being admitted to the hospital with kidney and bladder problems. They have a referral from their GP. Question 1: Can I be admitted to a hospital affiliated with my GP and by prescription or can I go to any one of them including a private clinic with this referral? Question 2: If I can go to the maternity ward, is it free and will they accept me without any problems if I am already in a hospital by prescription? Question 3: What is the difference between a private clinic and a regular hospital for childbirth? Where would you go?