 Nyorai kupfuurira kweiyi ndima - Muna April 2004, Blair akazivisa kuti referendamu yaizoitwa pamusoro pekubvumidzwa kweBumbiro reEU. Izvi zvaimiririra chiitiko chakakosha mune zvematongerwo enyika zveBritain: referendamu imwe chete yenyika yose yakanga yaitwa kare mu1975, pamusoro pekuti UK inofanira kuramba iri muEEC here kana kuti kwete., kunyange zvazvo referendamu yakanga yavimbiswa kana Hurumende yakasarudza kujoina Euro, uye referendamu dzakaitwa pamusoro pemasangano ehurumende muScotland, Wales neNorthern Ireland. Kwaiva kuchinja kukuru kwehurongwa hwaBlair, uyo akanga amboramba kudanwa kwereferendum kutoti bumbiro remitemo rakanga rachinja zvikuru ukama hweUK neEU. Michael Howard akabata iyi EU-kutendeuka, achiyeuchidza Blair nezvechirevo chake kumusangano weLabour Party muna 2003 kuti Ndinogona kuenda nenzira imwe chete. Handina chinodzosera kumashure. Referendamu yacho yaitarisirwa kuitwa mukutanga kwa2006; zvisinei, mushure mekurambwa kwebumbiro remutemo neFrance neNetherlands, hurumende yaBlair yakazivisa kuti yakanga ichimisa hurongwa hwerondedzero mune ramangwana rinotaridzika. 