Blur drummer Dave Rowntree has called the UK’s current assisted dying law “psychopathic” after his terminally ill ex-wife travelled to Dignitas in Switzerland to die alone.

The 60-year-old supported former music industry and charity sector worker Paola Marra – who he married in the 1990s – as she battled breast and bowel cancer before she flew alone to Zurich in March following a terminal diagnosis.

She made the decision because the “pain and suffering can become unbearable”,…