The brother of former Labour leader Jeremy Corbyn has claimed the coronavirus lockdown is a "psychological operation to close down the economy".
Piers Corbyn was arrested and slapped with a £10,000 fine for his part in anti-lockdown protests on Saturday which saw thousands descend on Trafalgar Square.
The 73-year-old, a climate change denier who set up controversial weather forecasting business Weather Action, said on Twitter he had been handed the fixed penalty fine as "organiser".
Asked about his suggestions that Boris Johnson "invented" a virus which might not exist, Mr Corbyn told Good Morning Britain: "I don't know if anyone invented it or not, but I would say that the numbers of people getting whatever they are getting is declining rapidly and there is no justification whatsoever so a continuing lockdown."
He added: "800,000 people have died and have been labelled Covid when it might have been completely something else. It is not a pandemic because the numbers dying are nothing different from a normal year of people dying.
"Secondly, it is not a high-consequence infectious disease, and that was declared by the Government and the World Health Organisation on March 19.
"So what we have is a psychological operation to close down the economy in the interest of mega corporations who are going to gain from massive job losses happening now."
Susanna Reid said Mr Corbyn's comments were an "insult" to families who have lost a loved one to coronavirus.
"40,000 people have died in this country as a result of Covid directly," she said. "What an insult to their families to say it's some kind of fiction to boost international pharmaceutical companies."
Mr Corbyn reiterated that companies were making "billions and billions" from the pandemic and added there was no need for a vaccine.
"There is no need for a vaccine," he said. "Vaccines cause death. The history of recent modern vaccines show they make people more ill.
"There is already a cure for these Covid symptoms...there's no need for a vaccine whatsoever, expect to make money for the mega corporations and the pharmaceutical companies."
ITV's Dr Hilary Jones slammed Mr Corbyn's statements and said they were "littered with dangerous errors".
"This is a new virus," he said. "This is nothing to do with viruses that we've seen in the last 40 years.
"All of your statements are not only dangerous, let me tell you about modern vaccines.
"We saw 460,000 cases every year of measles before vaccination. After that, we saw 130. A reduction of 99.9 per cent."
He told Mr Corbyn: "You are dangerous. You shouldn't be preaching, you are not medically qualified.
"I don't know where you get your rubbish fake news from and you shouldn't be on air."