Pamela Stephenson described her husband’s balance problem as the disease’s “most significant” symptom since his diagnosis ten years ago.

Sir Billy, 80, stated that it had been “added to the list of things that hold me back.”

The Scottish comedian and his wife spoke about their experiences with the degenerative condition for a Guardian piece.

“Recently, I’ve noticed a deterioration in my balance,” Sir Billy explained to the publication.

“That was never a problem before, but it came and stayed in the last year.”

“For some reason, I thought it would go away because a lot of the symptoms have come and gone away.”

Sir Billy was diagnosed with Parkinson’s disease in 2013 – the same day he was told he had prostate cancer, which he later had removed.

Five years later, he announced his retirement from live engagements.

Parkinson’s disease, the second most common neurodegenerative ailment after Alzheimer’s, causes portions of the brain to deteriorate over time.