Holiday home arson events questioned by Dafydd Iwan
The UK government's attempts to respond to arson attacks on holiday homes in Wales in the 80s and 90s have been revealed for the first time.
More than 200 properties were damaged in the so-called Meibion Glyndwr campaign.
Papers obtained by BBC Radio Cymru's Manylu programme highlight concerns about sympathy for the arsonists within Welsh-speaking communities.
Only one person was found guilty of being involved in the attacks.
Folk singer and campaigner Dafydd Iwan said he always had questions about the arson campaign.
- From the section Wales