'''Mahkamah Agung United Kingdom''' didirikan oleh Bahagian III [[Akta Pindaan Perlembagaan 2005]]. [[Lord Chancellor]] telah mengumumkan bahawa ia akan bermula beroperasi pada Oktober 2009 apabila premis barunya siap direnovasi<ref>{{cite web |url=http://www.publications.parliament.uk/pa/ld200607/ldhansrd/text/70614-wms0002.htm#07061426000067 |title=Written Statement of the Lord Chancellor and Justice Secretary regarding the Supreme Court |publisher=Lords Hansard |date=2007-06-14}}</ref>. Penubuhan mahkamah ini dianggarkan sebanyak £56.9 juta.<ref>{{cite web |url=http://www.publications.parliament.uk/pa/ld200708/ldhansrd/text/80326w0003.htm#column_WA102 |title=Written Answer of the Ministry of Justice to question posed by Lord Steinberg (Col. WA102 |date=2008-03-26 |publisher=Lords Hansard}}</ref>
ItIa willakan takemengambil over thealih [[judicial functions offungsi thekehakiman House of Lords]], whichyang arekini currently exercised by thedipunyai [[Lords of Appeal in Ordinary]] (Law Lords), asatu smallkumpulan numberkecil of members of theahli [[House of Lords]]. ItIa willjuga alsoakan assumemendapat somebeberapa functions of thefungsi [[JudicialJawatankuasa CommitteeKehakiman ofMajlis the Privy CouncilPrivi]]. The courtMahkamah willini beakan themenjadi [[suprememahkamah courtagung]] (court of last resort, highest [[appellatemahkamah courtrayuan]] tertinggi) indalam allsemua mattersperkara underberkenaan [[Englishundang-undang lawInggeris]], [[Contemporaryundang-undang WelshWales Lawterkni|Welsh law]] (to the extent that the [[National Assembly forundang-undang Wales]] makes laws fordan [[Wales]]undang-undang thatIreland differ from those in [[England]]) and [[Northern Irish lawUtara]].
ItAkan willtetapi notia havetidak authorityakan overada criminalkuasa caseskeatas inkes-kes jenayah di [[Scotland]], wheredi themana [[HighMahkamah Court ofTinggi Justiciary]] willakan remaintetap themenjadi suprememahkamah criminaljenayah courtyang tertinggi. However,Tetapi itia willmasih hearakan appealsmendegar fromrayuan the civildari [[CourtMahkamah of SessionSesyen]] sivil, just as thesepertimana House of Lords doesmendegarnya hari todayini.
Ia juga akan menentukan isu-isu devolisi, iaitu, kes dimana kuasa-kuasa ketiga-tiga kerajaan devolusi seperti [[pentadbiran Ireland Utara]], [[kerajaan Scotland]] dan [[kerajaan Dewan Wales]] atau undang-undang yang dibuat oleh Dewan Ireland Utara, Parlimen Scotland dan Dewan Kebangsaan Wales dipersoalkan. Isu-isu ini kini didengari Jawatankuasa Kehakiman Majlis Privi.
It will also determine devolution issues; that is, cases in which the legal powers of the three [[Devolution|devolved]] governments – the [[Northern Ireland Executive]], the [[Scottish Government]] and the [[Welsh Assembly Government]] – or laws made by the Northern Ireland Assembly, the Scottish Parliament or National Assembly for Wales are questioned. The Judicial Committee of the Privy Council currently has jurisdiction over these cases.
