I can only post my experience. My 62 year old battleaxe aunt, in an Asian country not UK - refused any treatment at all for her highly curable stage 1 lymphoma. I suspect she thought she’d quietly escape the horrors of chemo, of losing her waist length thick black hair, and that it would quietly and calmly one day send her off to sleep.
My dad and their other siblings and all of us her beloved nieces and nephews (she was a spinster and child free), coaxed, cajoled, fought, argued and battled till we frothed at the mouth.
Battleax aunt remained adamant, that she was simply going to ignore the cancer and I strongly suspect she thought she was taking the easy route out.
She died the most agonising and prolonged death I can describe ever, as the untreated lymphoma destroyed her.
I flew from the UK with 9 month old DS to show him to her and she recognised him and saw him and knew she’d had a grandnephew.
Then she died. I will never stop wondering what would have happened if a woman of 62, with stage 1 highly curable lymphoma and no co morbidities had been less stubborn and accepted the chemo.
My poor dad who lost his beloved little sis is still not over it. He thinks if only he had argued more with her… if only…