I think the coat Kate Middleton wore to the Cheltenham festival is very similar, if not the same in design, as a coat by British designer Katherine Hooker. Except Kate chose beige herringbone and brown felt trim.
And you can view it on her website.
http://www.katherine-hooker.co.uk/new/contrast.php
Here's a link to Kate in the coat I mean.
http://www.isifa.com/functions/water...ummer=11869921
And it probably explains her earlier trip to the Katherine Hooker store.
http://www.theroyalforums.com/forums...6&d=1139783628