▁UK ▁Government ▁department ▁C TO s ▁in ▁conj unction ▁with ▁the ▁Office ▁for ▁Government ▁Com merce ▁Bu ying ▁Sol utions ▁( O GC ▁B S ) ▁established ▁the ▁vision ▁for ▁a ▁single ▁commonly ▁provided , ▁proc ured ▁and ▁managed ▁public ▁sector ▁voice ▁and ▁data ▁network ▁infrastr ucture ▁to ▁replace ▁the ▁mult itude ▁of ▁separately ▁proc ured ▁and ▁managed ▁networks ▁serving ▁various ▁segments ▁of ▁the ▁UK ▁public ▁sector ; ▁Education , ▁Health , ▁Central ▁Government , ▁Local ▁Government ▁etc . ▁ ▁In ▁ 2 0 0 8 ▁an ▁Indust ry ▁Working ▁Group ▁was ▁established ▁to ▁document ▁the ▁object ives ▁and ▁requirements ▁more ▁clearly . ▁Their ▁report ▁set ▁out ▁the ▁architect ural ▁and ▁commercial ▁principles ▁as ▁well ▁as ▁anticip ated ▁security , ▁service ▁management , ▁govern ance ▁and ▁transition ▁arrang ements . ▁ ▁Architecture ▁ ▁The ▁PS N ▁compr ises ▁a ▁core ▁network , ▁the ▁Government ▁Con vey ancing ▁Network ▁or ▁G CN ▁provided ▁by ▁G CN ▁Service ▁Pro viders ▁or ▁GC NS P s . ▁The ▁G CN ▁inter connect s ▁multiple ▁operator ▁networks , ▁term ed ▁Direct ▁Network ▁Service ▁Pro viders ▁or ▁DNS P s . ▁Sub scri ber ▁organis ations ▁contract ▁to ▁a ▁connection ▁from ▁a ▁local ▁particip ating ▁DNS P , ▁connect ▁via ▁that ▁to ▁G CN ▁and ▁hence ▁on wards ▁to ▁other ▁inter connected ▁networks ▁and ▁services . ▁The ▁G CN ▁network ▁is ▁entirely ▁based ▁on ▁IP v 4 ▁and ▁M PL S ▁and ▁the ▁GC NS P s ▁are ▁not ▁currently ▁mand ated ▁to ▁provide ▁IP v 6 ,