New clues point to portrait painter's identity

Art historians are one step closer to discovering the identity of a royal painter thanks to scientific research.

Analysis by the National Portrait Gallery of two renowned portraits of Elizabeth I has shown they were painted on wood from the same two trees.

The 16th century paintings have been associated with artist Nicholas Hilliard for many years.

Curator Tarnya Cooper said the research meant the work is probably that of Hilliard or someone working with him....