Parents of two of the Greenpeace detainees being held in Russia said they felt encouraged by the ongoing support through the world for the Arctic 30.
Ann and Andy Bryan, parents of freelance photographer Kieran Bryan, were joined by Sue Turner, the mother of engineer Iain Rogers, outside a petrol station in Exeter.
Around 80 people joined the protest.
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A stranded van had to be rescued from the sea at Brean in Somerset on Thursday night - the owners had gone for a walk on the Down.
Dawn French and Jennifer Saunders were reunited on stage for the first time in more than eight years on Thursday, at Bristol's Colston Hall.
Auditors say the government has locked consumers into a "risky and expensive project" with uncertain strategic and economic benefits.