Royal snail: Kate races ahead with her painting at Inner-City Arts campus whilst William is slow off the mark

By REBECCA ENGLISHFull steam ahead: Kate cracks on with her drawing at the Inner-City Arts centre, whilst William is slow off the mark, and looks as if he is asking for some advice on how to start his campus creationThe Duke and Duchess of Cambridge left their mark on Los Angeles yesterday as they made imprints of their hands in clay. The couple were visiting Inner-City Arts, a not-for-profit