The Netherlands was the first country to legalise assisted dying but critics are starting to worry about the consequences

Over a 40-plus-year career, Oosterhoff has come to three conclusions: mental illness can cause “unbearable and untreatable” suffering just as physical illness can; the chance of a miracle recovery after years of unsuccessful treatment is, he says, depressingly slim; and so psychiatric patients have as much of a right to a humane, painless death as someone with terminal cancer.