During his period in parliament Peacock was in favour of Home Rule, of the reform of the House of Lords, the disestablishment and disendowment of the church and the establishment of local self-government.
Während seiner Zeit im Parlament befürwortete Peacock die "Home Rule", die Reform des House of Lords, die Abtrennung und die Entrechtung der Kirche und die Einrichtung von lokaler Selbstverwaltung.