Nine more artists are challenged with creating portraits of one of celebrity sitters Rory Stewart, Ainsley Harriott and Rob Delaney.

Nine more contestants take part in the second heat of the competition, where the celebrity sitters are Jay Rayner, Nihal Arthanayake and Susanna Reid.

Stephen Mangan and Joan Bakewell host the first heat of this year's competition from Battersea Art Centre, where a new crop of artists looks to impress the judges with a portrait of Richard Curtis, Emma Freud or Fleur East.

Stephen Mangan and Joan Bakewell present a special feature-length episode in which the nine previous winners return to the Battersea Arts Centre to paint actress Judi Dench.