Image copyright Rory Cellan-Jones/Twitter

The BBC's technology correspondent Rory Cellan-Jones has revealed he has been diagnosed with Parkinson's disease.

TV viewers noticed his hand shaking during a report on 5G technology on BBC Breakfast on Thursday morning.

Symptoms of Parkinson's - a degenerative brain condition - include involuntary tremors and stiff muscles.

"I'm getting good treatment and the symptoms are mild right now - so I'm carrying on as normal. Onwards and upwards!" he wrote on Twitter.

His BBC colleagues reached out with messages of support on social media, with Brussels reporter Adam Fleming writing: "True public service to be so open about it. Best wishes."

Cellan-Jones started his BBC career as a researcher on Look North and became the business and economics correspondent in 1990.

After the dot-com crash of 2000, he wrote the book Dot.bomb and has reported on the growth of websites and internet companies.