In her latest report, external, Morris said men with prostate cancer had been failed by the NHS in North Wales for almost a decade.
In Williams’ case, he waited almost four times longer than he should have done to begin treatment.
Morris wrote: “On the balance of probabilities, these delays more likely than not contributed to [his] cancer being more advanced. The uncertainty this creates will sadly be an enduring injustice for [him] and his family.”
The 72-year-old, from Amlwch on Anglesey, had a routine blood test for the disease in 2023 and was told in early 2024 it was an aggressive form.
The ombudsman’s report said he should have had a PSMA PET scan – an advanced imaging test that identifies cancer cells – within 62 days of his diagnosis.
When he finally had one in May 2024, it confirmed the cancer had already spread to his bones and lymph nodes.
He has since been told it is incurable but he is being treated to control its spread.
“It was obvious there was a finite window of time to sort it,” Williams said.
“You feel very exposed when you get a diagnosis of cancer and you think you can rely on the doctors and the specialists.
“But these people didn’t seem to see the urgency.”