A doctor is a highly respected profession. However, the hours are long and the work is stressful, although the salary is good. As you might imagine you will need a degree, and therefore need good grades at GCSE and A-level to secure a place at university. All degrees in medicine take place at teaching hospitals up and down the country, and you will get much opportunity to practice in a live environment.
You will need to be calm under pressure, have the ability to think logically and remember what you have been taught in even the most extreme circumstances. You can either by a hospital doctor or a General Practitioner, which may involve an element of local cottage hospital practice as well.
The training takes place over 5 years, and you will definitely need to make sure you have top class grades in English, Science and Mathematics, and choose subjects appropriately for A-level: Biology being a definite requirement. Much of the training will be practical based, but there will be lots of classroom time, and you will be required to submit many papers on many subjects.
Some days will be traumatic, some frustrating and some downright boring. However, you do have to be consistent with each new patient and be able to keep the best Dr-Patient relationship going whatever sort of day you have had; you are dealing with poorly people who are not feeling their best, and concerned friends and relatives who need reassurance.