Good practice formally demands adequate discussions between doctor and patient in deciding on treatment. This website shows the protocol:
gmc-uk.org/ethical-guidance...
An excerpt:
From Good Medical Practice Consent: patients and doctors making decisions together
The doctor uses specialist knowledge and experience and clinical
judgement, and the patient’s views and understanding of their
condition, to identify which investigations or treatments are likely
to result in overall benefit for the patient. The doctor explains the
options to the patient, setting out the potential benefits, risks,
burdens and side effects of each option, including the option to
have no treatment. The doctor may recommend a particular option
which they believe to be best for the patient, but they must not put
pressure on the patient to accept their advice.
The patient weighs up the potential benefits, risks and burdens
of the various options as well as any non-clinical issues that are
relevant to them. The patient decides whether to accept any of the
options and, if so, which one. They also have the right to accept
or refuse an option for a reason that may seem irrational to the
doctor, or for no reason at all.
If the patient asks for a treatment that the doctor considers would
not be of overall benefit to them, the doctor should discuss the
issues with the patient and explore the reasons for their request. If,
after discussion, the doctor still considers that the treatment would
not be of overall benefit to the patient, they do not have to provide
the treatment. But they should explain their reasons to the patient,
and explain any other options that are available, including the
option to seek a second opinion.
It seems that there are far too few instances recorded here of patients having that kind of (mandatory according to guidelines) interaction with the GP. I think that all patients having an appointment with their GP/endo should carry this excerpt with them, if things go awry.