If memory serves me well there was uproar with the LCP at end of life which allowed death to naturally occur. Stories about hospitals given extra money if they put patients on them and false stories about people dying of thirst… but 10 years later it’s fine and HCPs can kill you!!
The main issues I see are;
No one should be in unbearable pain. If they are that is a failure of the existing MDT supporting that patient. We should not accept people preferring death to life due to uncontrolled pain - that’s just a cop out of a medical professional not doing their job properly. I do accept there is a limit to this and that is where the pain control is leaving the patient so sedated they have no quality of life. So here a patient should be given a choice, we can ramp up the pain management but you are not going to know what day of week it is and offer the option of death then. That seems a reasonable point for pain (for other conditions there can be very fixed points in the disease trajectory a decision can be made).
Who is going to provide the assistance? It will be wholly unreasonable to expect to pitch up at your local hospital and expect a nurse or doctor to do this. You will need a single centralised place where this can happen - somewhere in the middle of the country. That will require multiple visits to provide psychological support.
People must have capacity at point of death to confirm that is their wish. You cannot rely on something like a DNR, it’s fundamentally different - with a DNR you are already dead.
Primarily I have little issue in concept with allowing people to choose death - my issues is - ok great, but who, how, under what conditions, and what guardrails. Will our MPs think of the practical implementation of their policy when voting? we can only hope.