 The proposed trial aims to apply the research experience regarding self-management in essential hypertension to postpartum women with HDP where both high and low BPs can lead to adverse outcomes, and where detection of on-going hypertension is essential. This study is a pilot study: it has been set up in order to inform the planning of a large-scale multi-centre randomised controlled trial by testing the feasibility of methods and procedures for later use on a large scale. We want to increase our experience of applying this management approach in this subset of patients; to select the most appropriate primary outcome measure and to estimate the effect size of this intervention; to assess recruitment potential; and to evaluate the feasibility of coordinating this trial across several centres. The primary objective of the large-scale trial will be to determine whether the self-management approach can improve BP control in women with medicated HDP in the postnatal period. 