RUC rank and file had become ‘more sectarian’ during 1980s; UDR tried to intimidate Irish army checkpoint.

Murder of comedian’s father features in files; Anger at arrests of 28 UDR members; Stalker confided in Irish diplomat.

Prospect of NIO minister attending GAA game discussed; IRA plan to exploit key Tory policy.

Election of Tories met by surge in political violence.