 Nyora kupfuurira kweiyi ndima - 5 June 1975 referendamu pamusoro peBritish EEC nhengorakagadzirisa nhau yenzvimbo yeBritain muEurope, uye kubva panguva iyoyo zvichienda mberi, bato reLabour rakada mugove waro wokugadza nhengo dzeMEP. OHagan nokudaro akarasikirwa nechigaro chake musi wa3 Chikunguru 1975 mushure mesarudzo yakabatanidzwa nemapato eConservative neLabour yekurega kugadza Vakazvimirira uye maLiberals kuParamende yeEurope. Akabva apinda mubato reConservative ndokuva whip uye mutauriri wevanotsigira zveConservatives muHouse of Lords pakati pa1977 na1979. Akanga achibatanidzwawo muPrimrose League isati yaparara, achishanda saChancellor wayo kubva muna Kubvumbi 1979 kusvika Kubvumbi 1981. 