No doubt about it but the 'Southern Ireland' State was set up as a vassal/client state of England.No, they just re-brand every now and then. There was a fair old clear out after the fall of the Berlin Wall, which just saw loads of new 'Risk Management' companies being set up in the private sector.
This allowed 'plausible deniability' at government level and allowed for the hiring of private contractors by corporations (Blackwater and the like) along with the usual parasitism off the defence industry which makes Halliburton shareholders wealthy.
I believe the MI5, 6 designations have now been shelved in preference to the 'SIS' abbreviation
England still pulls the strings.