Two rarely-seen royal paintings by Van Dyck from the Prime Minister’s country house Chequers are to be displayed alongside the artist’s last self-portrait in a new display at the National Portrait Gallery.

The portraits of King Charles I and Henrietta Maria are expected to be star attractions at the Van Dyck: Transforming British Art exhibition, which has been curated to mark the temporary return of the artist’s recently acquired self-portrait part-way through its nationwide tour.