Manifestos became increasingly central to the electoral campaign and the parties’ efforts to develop a ‘national’ rather than purely sectional appeal after 1918. The party leader’s address-as-manifesto did persist, but it became a rarity. Labour was at the forefront of the development of programmatic politics, producing more substantive and heavyweight manifestos than their more slogan-based pre-1914 equivalents. While the other parties eventually followed Labour’s lead in providing more detailed manifestos outlining proposed legislation, distrust of programmatic politics still lingered. Some politicians, most notably Stanley Baldwin, criticized the apparent escalation of election promises. Although election addresses remained vital to the local campaign, in part as a result of the introduction of the free postal communication in 1918, their relative importance declined in relation to manifestos. Addresses became increasingly uniform documents, designed to complement manifestos, as a result of increasing use of material from party press services.