Pedzisa mutsara unotevera: Pashure pokutsigira Mutungamiriri weHurumende Anthony Eden mukati me1956
Pakupinda muSuez, Ridsdale akashanda kubva muna 1957 kusvika muna 1958 semunyori weparamende (PPS) kuna John Profumo, mutevedzeri wemunyori weparamende wezvematongerwo enyika. Kubva muna 1958 kusvika muna 1960 aiva PPS kuna Minister of State for Foreign Affairs. Basa rake roufundisi rakanga rakapfupika, saParliamentary Under-Secretary of State for Air kubva muna 1962 kusvika muna 1964.