Greenpeace activist Anthony Perrett is on his way home to Monmouthshire after being held in Russia for 100 days.

The former Caldicot town councillor was one of 30 people held originally on piracy and then hooliganism charges by the Russian authorities after protesting against Arctic oil drilling.

Last week, they were all released under a new Russian amnesty law.

Mr Perrett, who travelled back to the UK with fellow activists Alexandra Harris and Phil Ball, told the BBC the protest had been worth it but admitted: "It's been a very long 100 days.

"I'm quite eager to get back to Wales and sleep in my own bed and get back to work."

He said the group, who became known as the Arctic 30, were not treated badly but described the prison as having "the aesthetics of a concentration camp".

"We weren't treated like prisoners of war [but] it had very much the razor wire and the barbed wire and the reinforcing bar which made up cages," he said.

"I hope we've got the conversation started in Russia about the drilling in the Arctic and raised it with the Russian voters.

"It was definitely worth it. Unless humanity starts acting as one people on this planet we're going to irrevocably change the climate and make it unliveable on this planet for everybody."