The work of Doctors in the NHS

Once they have obtained a training place in a particular speciality, the doctor will be attached to a particular department in a particular hospital for a time, after which they will rotate to another location.
However, this does not mean that a doctor training in urology will remain solely in theatres or on a particular ward. If they are the on call doctor for that specialty on a particular day or night shift, they will often be the on holding the referral bleep and be asked to come and review or consult with patients on other wards, other sites or in surgical/medical assessment units or in the emergency department. Some surgical trainees are expected to run surgical clinics at times- they will be asked to
The same would broadly apply to doctors training in medical or other surgical specialties. Ear, nose and throat for example, will be asked for advice on patients who have presented to the ED front desk, they may perhaps later come to the department to consult and examine the patient and then formally admit the patient or carry out a procedure within the department. Doctors working in Obs and Gynae would be another common specialty to call to ED, as would paediatrics (although some hospitals now have specialist paediatric emergency departments).
Doctors working in intensive care or anaesthesia would also be attending the ED a lot as and when their skills are required.
I am not familiar with urology as a training pathway but I suspect you would have to complete core surgical training to be able to start in urology which means you will be trained first in other surgical aspects first and so much of the above would still apply to you.
Can I ask why you are asking about the need to work in the emergency department specifically?

I was just trying to ascertain what a junior doctor actually does whilst training to be a registrar and beyond. It seemed incomplete to expect a doctor to only spend nearly all their time within the training speciality beyond F2.

So after FY2, doctors don't get involved much with patients that come in through A & E? They only really see patients referred to hospital via their GP?

So after FY2, doctors don't get involved much with patients that come in through A & E? They only really see patients referred to hospital via their GP?

I mentioned some of this in my first post.
A doctor on a urology training pathway may be called to consult, examine, review or perform a procedure on any patient in the entire hospital where urology input might be required.
However, this does not mean they will be working in the emergency department seeing absolutely any other patient the department might contain. In the main, the people working in emergency will try to manage what they can in the department themselves but call upon other departments as needed.
I have worked in primary care, secondary care and in particular the emergency department on and off quite some time. By way of example, in any average shift in ED this kind of process might occur:

Lots of doctors, and even consultants; the most senior members of their team, can and will seek advice from other doctors/registrars or consultants as needed when managing their patients. If you're an F2 working on a respiratory ward and a patient develops urinary retention, you might well consult the on-call urology team for advice at some point. Everyone works to their level of competence and knowledge and would be expected to seek advice from others as needed.
Fully trained GPs are considered consultants in of themselves. They can (and do) refer patients directly to acute medical admissions or to surgical or medical assessment clinics. They do not solely send people to the emergency department because if a qualified doctor has already assessed the patient and the GP thinks they need admission to hospital, a medical or surgical ward might be far preferrable than sending people to ED and simply adding to the case load there. The clue is in the name: accident or emergency. If the patient isn't acutely unwell then in reality it's a bit unfair to send people to ED if you know they will need medical or surgical assessment anyway- people coming to general practice are normally ambulatory and well enough to come to the practice but they can be more unwell than you'd think sometimes, say with a condition like asthma in a patient who has a history of nasty exacerbations of their asthma, that would be one scenario where I'd be ringing the red phone and telling the consultant in charge I'm sending someone directly to them.
The role of general practice is vast and by far the most demanding role in medicine and not for the unwary. It involves a great deal of responsibility and the ability to recognise and manage risk and these require a lot of confidence in your examination, consultation and management skills. That being said, it is amongst the most productive part of our healthcare system and by far the most cost effective: general practice does 90% of the work in the NHS and gets less than 10% of the spending. Without a growing number of solid and capable doctors in general practice, the present system would struggle in a big way.

I have to say, l expected junior doctors (l don't like their new name, resident doctors) to spend more time working in different areas alongside their main speciality. For example, I thought a doctor that has started their speciality training in Urology would also be expected to regularly diagnose things like a pinched nerve, muscle tearing, measles etc. Essentially all the things they would have come across during their foundation years.

I have to say, l expected junior doctors (l don't like their new name, resident doctors) to spend more time working in different areas alongside their main speciality. For example, I thought a doctor that has started their speciality training in Urology would also be expected to regularly diagnose things like a pinched nerve, muscle tearing, measles etc. Essentially all the things they would have come across during their foundation years.