We eventually found Primrose Bakery further down Gloucester Avenue back towards Camden. They have two shops, the one here and one in Covent Garden. I assume from the name that the Primrose Hill shop was the first. Their shop is a modestly sized cafe in shabby chic style with primrose yellow formica tables. Cupcakes were a competitive £1.75 each. I took away two in a cardboard box for my husband and I to eat for our pudding that evening.