I got a bunch of her prints at the Royal Welsh when I last visited Wales, but they are just impossible to find here.  Someone told me about an e-store, Art4Prints, but it doesn't appear to have an ordering capability at this time.  If someone knows where I can either get a book of her work, or the prints of "Trot", "Half Pass", and "Look Mummy", I'd very much appreciate knowing.  I seem to have missed these three.
Thanks!