The arson campaign was one of the most intriguing stories of the 1980s in Wales and for many years the identity of Meibion Glyndwr remained a mystery.
When Sion Aubrey Roberts was sentenced to 12 years in prison in 1993 for sending incendiary devices through the post, many believed MI5 had framed the 21 year old man.
But in his only interview upon his release in 1997, Sion Aubrey admitted to being a member of Meibion Glyndwr and that he had taken an active part in their campaign. In this exclusive interview for Y Byd ar Bedwar he claims that a number of other Welsh people were willing to act and that he would have been ready to die for the cause.
30 years of Y Byd ar Bedwar, Tuesday, October 30th at 8.25 on S4C.