An unseen sketch by one of the original illustrators of the Harry Potter books could sell for more than £10,000.

The sketch of Harry meeting the mythical Hippogriff was drawn by Uckfield-based artist Cliff Wright, who designed the front covers for books two and three of the series.

Mr Wright refused to illustrate the fourth book after his original front and back cover artwork for The Prisoner of Azkaban was lost by a design studio.

Antique dealer Art Of The Imagination is selling the drawing at the Antiques for Everyone Fair at the NEC in Birmingham from October 27 to 30.