This grower is sure of this plant identification.
Lucky dip in terms of the colours when out of flowering as they are not labelled with flower colour.
Primrose, Primula, Polyanthus
Primula genus (Primrose). These are annuals, biennials and perennials, some of which are evergreen. They are produced in rosettes of basal leaves with tubular, bell or primrose-shaped flowers. The flower stems, leaves and sepals are covered with farina (a waxy powder).
They are hardy to frost tender, and they prefer fertile, well-drained soils. They grow in partial-shade with ample water. Repot pot-grown plants annually. Tidy-up fading foliage and dead-head as flowering ceases.
There are primulas suitable for almost every type of site; border, screen garden, bog garden, pool margin, greenhouse and alpine house.