Those with a clinical diagnosis of current major or minor depressive disorder and who do not meet exclusion criteria ( that is , currently receiving treatment for depression , significant difficulty with English , medium to high suicide risk , current self-harm , current substance abuse , current post-traumatic stress disorder , current manic/hypomanic episode or psychotic symptoms ) will be randomised to receive either a 4-session mother-infant intervention ( HUGS : Happiness Understanding Giving and Sharing ) or a 4-session attention placebo playgroup ( Playtime ) following a 12-session postnatal depression group treatment programme .