Journalist, author and long-standing anti-nuclear campaigner Crispin Aubrey has died aged 66, it has been announced.
The Stop Hinkley campaign said Aubrey suffered a fatal heart attack on Friday afternoon.
Aubrey, who lived in Somerset with his family, had been preparing for the planned protest against Hinkley C next weekend and was due to speak at the rally next Saturday.
Katherine Attwater, from the Stop Hinkley campaign, said: "Crispin's wife Sue, also part of the Stop Hinkley campaign, has bravely requested that the 'show must go on because it's what Crispin would have wanted'.
"The Aubreys were involved in the original protest against Hinkley C over 20 years ago.
"Crispin took a lead role in the public inquiry and co-ordinated the campaign which was heralded a success as the reactor was never built."
Aubrey was a life-long campaigner and had been a journalist all his working life, starting at the Hampshire Chronicle and London's Time Out magazine.
He came to national prominence when he was arrested under the Official Secrets Act in 1977 while working for Time Out.
The ABC trial - named after the defendants Aubrey, former soldier John Berry and investigation journalist Duncan Campbell - made national headlines when they appeared in 1978 at the Old Bailey.
The three were convicted on a lesser charge and given non-custodial sentences.