Medical law breach of duty

2(a) Layla is 16 years old and has been out at the beach at a barbeque with her friends Molly and Dan. Layla has been drinking and smoking marijuana all night and around 11pm she tells her friends she is going home. She is very unsteady on her feet and whilst attempting to cross the road she is hit by a passing car. The driver Ollie gets out, sees Layla is unconscious and calls the emergency services. Layla is taken to Uplands NHS Trust where is she attended by Dr Patel. As Dr Patel is ordering an emergency blood transfusion Layla regains consciousness. She starts screaming at Dr Patel saying "Get away from me, I am not having any needles near me. I know my rights. You cannot touch me". Advise Dr Patel if he can legally treat Layla. How would your answer differ if Layla was 19